12987906 has 32 divisors (see below), whose sum is σ = 27820800. Its totient is φ = 4029840.

The previous prime is 12987899. The next prime is 12987907. The reversal of 12987906 is 60978921.

It is not an unprimeable number, because it can be changed into a prime (12987907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5761 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (869400).

Almost surely, 2^12987906 is an apocalyptic number.

12987906 is an abundant number, since it is smaller than the sum of its proper divisors (14832894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12987906 is a wasteful number, since it uses less digits than its factorization.

12987906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 12987906 is about 3603.8737491760. The cubic root of 12987906 is about 235.0605306575.

The spelling of 12987906 in words is "twelve million, nine hundred eighty-seven thousand, nine hundred six".