13212987 has 16 divisors (see below), whose sum is σ = 17994240. Its totient is φ = 8622432.

The previous prime is 13212967. The next prime is 13213001. The reversal of 13212987 is 78921231.

It is not a de Polignac number, because 13212987 - 2¹⁸ = 12950843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13212907) 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, 46548 + ... + 46830.

It is an arithmetic number, because the mean of its divisors is an integer number (1124640).

Almost surely, 2^13212987 is an apocalyptic number.

13212987 is a deficient number, since it is larger than the sum of its proper divisors (4781253).

13212987 is a wasteful number, since it uses less digits than its factorization.

13212987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562.

The product of its digits is 6048, while the sum is 33.

The square root of 13212987 is about 3634.9672625761. The cubic root of 13212987 is about 236.4106312196.

The spelling of 13212987 in words is "thirteen million, two hundred twelve thousand, nine hundred eighty-seven".