12642057 has 12 divisors (see below), whose sum is σ = 18890820. Its totient is φ = 8137248.

The previous prime is 12642053. The next prime is 12642059. The reversal of 12642057 is 75024621.

12642057 is a `hidden beast` number, since 12 + 642 + 0 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5861241 + 6780816 = 2421^2 + 2604^2 .

It is not a de Polignac number, because 12642057 - 2² = 12642053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12642057.

It is not an unprimeable number, because it can be changed into a prime (12642053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23958 + ... + 24479.

It is an arithmetic number, because the mean of its divisors is an integer number (1574235).

Almost surely, 2^12642057 is an apocalyptic number.

It is an amenable number.

12642057 is a deficient number, since it is larger than the sum of its proper divisors (6248763).

12642057 is a wasteful number, since it uses less digits than its factorization.

12642057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48472 (or 48469 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 12642057 is about 3555.5670433842. The cubic root of 12642057 is about 232.9552923732.

Adding to 12642057 its reverse (75024621), we get a palindrome (87666678).

It can be divided in two parts, 1264 and 2057, that added together give a triangular number (3321 = T₈₁).

The spelling of 12642057 in words is "twelve million, six hundred forty-two thousand, fifty-seven".