126438165 has 80 divisors (see below), whose sum is σ = 262149888. Its totient is φ = 57106944.

The previous prime is 126438161. The next prime is 126438227. The reversal of 126438165 is 561834621.

It is a happy number.

126438165 is a `hidden beast` number, since 1 + 2 + 643 + 8 + 1 + 6 + 5 = 666.

It is not a de Polignac number, because 126438165 - 2² = 126438161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126438161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 291789 + ... + 292221.

Almost surely, 2^126438165 is an apocalyptic number.

126438165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126438165 is an abundant number, since it is smaller than the sum of its proper divisors (135711723).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126438165 is a wasteful number, since it uses less digits than its factorization.

126438165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 551 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 126438165 is about 11244.4726421473. The cubic root of 126438165 is about 501.9102459600.

The spelling of 126438165 in words is "one hundred twenty-six million, four hundred thirty-eight thousand, one hundred sixty-five".