12457157427 has 40 divisors (see below), whose sum is σ = 21862154160. Its totient is φ = 6969032640.

The previous prime is 12457157407. The next prime is 12457157431. The reversal of 12457157427 is 72475175421.

It is a happy number.

12457157427 is a `hidden beast` number, since 1 + 2 + 4 + 5 + 71 + 574 + 2 + 7 = 666.

It is not a de Polignac number, because 12457157427 - 2⁸ = 12457157171 is a prime.

It is a super-3 number, since 3×12457157427³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12457157407) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 526152 + ... + 549317.

It is an arithmetic number, because the mean of its divisors is an integer number (546553854).

Almost surely, 2^12457157427 is an apocalyptic number.

12457157427 is a deficient number, since it is larger than the sum of its proper divisors (9404996733).

12457157427 is a wasteful number, since it uses less digits than its factorization.

12457157427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075505 (or 1075496 counting only the distinct ones).

The product of its digits is 548800, while the sum is 45.

The spelling of 12457157427 in words is "twelve billion, four hundred fifty-seven million, one hundred fifty-seven thousand, four hundred twenty-seven".