12639322 has 16 divisors (see below), whose sum is σ = 19400544. Its totient is φ = 6174000.

The previous prime is 12639283. The next prime is 12639329. The reversal of 12639322 is 22393621.

It is not an unprimeable number, because it can be changed into a prime (12639329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25497 + ... + 25987.

It is an arithmetic number, because the mean of its divisors is an integer number (1212534).

Almost surely, 2^12639322 is an apocalyptic number.

12639322 is a deficient number, since it is larger than the sum of its proper divisors (6761222).

12639322 is a wasteful number, since it uses less digits than its factorization.

12639322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765.

The product of its digits is 3888, while the sum is 28.

The square root of 12639322 is about 3555.1824144480. The cubic root of 12639322 is about 232.9384918721.

It can be divided in two parts, 1263 and 9322, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 12639322 in words is "twelve million, six hundred thirty-nine thousand, three hundred twenty-two".