12987442 has 16 divisors (see below), whose sum is σ = 21248640. Its totient is φ = 5917392.

The previous prime is 12987437. The next prime is 12987461. The reversal of 12987442 is 24478921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1108 + ... + 5215.

It is an arithmetic number, because the mean of its divisors is an integer number (1328040).

Almost surely, 2^12987442 is an apocalyptic number.

12987442 is a deficient number, since it is larger than the sum of its proper divisors (8261198).

12987442 is a wasteful number, since it uses less digits than its factorization.

12987442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417.

The product of its digits is 32256, while the sum is 37.

The square root of 12987442 is about 3603.8093734270. The cubic root of 12987442 is about 235.0577314025.

It can be divided in two parts, 129 and 87442, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 12987442 in words is "twelve million, nine hundred eighty-seven thousand, four hundred forty-two".