12639151 has 4 divisors (see below), whose sum is σ = 14444752. Its totient is φ = 10833552.

The previous prime is 12639149. The next prime is 12639181. The reversal of 12639151 is 15193621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15193621 = 59 ⋅257519.

It is a cyclic number.

It is not a de Polignac number, because 12639151 - 2¹ = 12639149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639181) 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, 902790 + ... + 902803.

It is an arithmetic number, because the mean of its divisors is an integer number (3611188).

Almost surely, 2^12639151 is an apocalyptic number.

12639151 is a deficient number, since it is larger than the sum of its proper divisors (1805601).

12639151 is an equidigital number, since it uses as much as digits as its factorization.

12639151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805600.

The product of its digits is 1620, while the sum is 28.

The square root of 12639151 is about 3555.1583649677. The cubic root of 12639151 is about 232.9374413764.

The spelling of 12639151 in words is "twelve million, six hundred thirty-nine thousand, one hundred fifty-one".