126157725 has 18 divisors (see below), whose sum is σ = 225962906. Its totient is φ = 67284000.

The previous prime is 126157709. The next prime is 126157727. The reversal of 126157725 is 527751621.

126157725 is a `hidden beast` number, since 1 + 2 + 61 + 577 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2013561 + 124144164 = 1419^2 + 11142^2 .

It is not a de Polignac number, because 126157725 - 2⁴ = 126157709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126157725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126157727) 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 17 ways as a sum of consecutive naturals, for example, 280126 + ... + 280575.

Almost surely, 2^126157725 is an apocalyptic number.

126157725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126157725 is a deficient number, since it is larger than the sum of its proper divisors (99805181).

126157725 is a wasteful number, since it uses less digits than its factorization.

126157725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560717 (or 560709 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 126157725 is about 11231.9955929479. The cubic root of 126157725 is about 501.5388920964.

The spelling of 126157725 in words is "one hundred twenty-six million, one hundred fifty-seven thousand, seven hundred twenty-five".