126135251 has 16 divisors (see below), whose sum is σ = 140535648. Its totient is φ = 112243200.

The previous prime is 126135241. The next prime is 126135259. The reversal of 126135251 is 152531621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126135251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126135251.

It is not an unprimeable number, because it can be changed into a prime (126135259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212411 + ... + 213003.

It is an arithmetic number, because the mean of its divisors is an integer number (8783478).

Almost surely, 2^126135251 is an apocalyptic number.

126135251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126135251 is a deficient number, since it is larger than the sum of its proper divisors (14400397).

126135251 is a wasteful number, since it uses less digits than its factorization.

126135251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its digits is 1800, while the sum is 26.

The square root of 126135251 is about 11230.9951028393. The cubic root of 126135251 is about 501.5091086000.

Adding to 126135251 its reverse (152531621), we get a palindrome (278666872).

The spelling of 126135251 in words is "one hundred twenty-six million, one hundred thirty-five thousand, two hundred fifty-one".