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126671985 = 33511197433
BaseRepresentation
bin1111000110011…
…01110001110001
322211100121022000
413203031301301
5224412000420
620323004213
73065460036
oct743156161
9284317260
10126671985
11655595a0
1236509669
1320321a4b
1412b7538d
15b1c2690
hex78cdc71

126671985 has 64 divisors (see below), whose sum is σ = 247484160. Its totient is φ = 60963840.

The previous prime is 126671977. The next prime is 126671989. The reversal of 126671985 is 589176621.

It is not a de Polignac number, because 126671985 - 23 = 126671977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Together with 120812175 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 126671985.

It is not an unprimeable number, because it can be changed into a prime (126671989) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 292329 + ... + 292761.

It is an arithmetic number, because the mean of its divisors is an integer number (3866940).

Almost surely, 2126671985 is an apocalyptic number.

126671985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126671985 is a deficient number, since it is larger than the sum of its proper divisors (120812175).

126671985 is a wasteful number, since it uses less digits than its factorization.

126671985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 649 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 126671985 is about 11254.8649481013. The cubic root of 126671985 is about 502.2194468674.

The spelling of 126671985 in words is "one hundred twenty-six million, six hundred seventy-one thousand, nine hundred eighty-five".

Divisors: 1 3 5 9 11 15 27 33 45 55 99 135 165 197 297 433 495 591 985 1299 1485 1773 2165 2167 2955 3897 4763 5319 6495 6501 8865 10835 11691 14289 19485 19503 23815 26595 32505 42867 58455 58509 71445 85301 97515 128601 214335 255903 292545 426505 643005 767709 938311 1279515 2303127 2814933 3838545 4691555 8444799 11515635 14074665 25334397 42223995 126671985