12642254039 has 4 divisors (see below), whose sum is σ = 12647675256. Its totient is φ = 12636832824.

The previous prime is 12642254021. The next prime is 12642254071. The reversal of 12642254039 is 93045224621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93045224621 = 37799 ⋅2461579.

It is a cyclic number.

It is not a de Polignac number, because 12642254039 - 2²⁰ = 12641205463 is a prime.

It is a super-2 number, since 2×12642254039² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12642253993 and 12642254011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642254089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2707109 + ... + 2711774.

It is an arithmetic number, because the mean of its divisors is an integer number (3161918814).

Almost surely, 2^12642254039 is an apocalyptic number.

12642254039 is a deficient number, since it is larger than the sum of its proper divisors (5421217).

12642254039 is an equidigital number, since it uses as much as digits as its factorization.

12642254039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421216.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 12642254039 in words is "twelve billion, six hundred forty-two million, two hundred fifty-four thousand, thirty-nine".