12517642 has 4 divisors (see below), whose sum is σ = 18776466. Its totient is φ = 6258820.

The previous prime is 12517613. The next prime is 12517667. The reversal of 12517642 is 24671521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24671521 = 7 ⋅3524503.

It can be written as a sum of positive squares in only one way, i.e., 10504081 + 2013561 = 3241^2 + 1419^2 .

It is a super-2 number, since 2×12517642² = 313382722480328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12517642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3129409 + ... + 3129412.

Almost surely, 2^12517642 is an apocalyptic number.

12517642 is a deficient number, since it is larger than the sum of its proper divisors (6258824).

12517642 is an equidigital number, since it uses as much as digits as its factorization.

12517642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6258823.

The product of its digits is 3360, while the sum is 28.

The square root of 12517642 is about 3538.0279818000. The cubic root of 12517642 is about 232.1885729025.

The spelling of 12517642 in words is "twelve million, five hundred seventeen thousand, six hundred forty-two".