12520989 has 24 divisors (see below), whose sum is σ = 19685120. Its totient is φ = 7623072.

The previous prime is 12520987. The next prime is 12520997. The reversal of 12520989 is 98902521.

It is not a de Polignac number, because 12520989 - 2¹ = 12520987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11532 + ... + 12570.

Almost surely, 2^12520989 is an apocalyptic number.

It is an amenable number.

12520989 is a deficient number, since it is larger than the sum of its proper divisors (7164131).

12520989 is a wasteful number, since it uses less digits than its factorization.

12520989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 12520989 is about 3538.5009537939. The cubic root of 12520989 is about 232.2092654552.

The spelling of 12520989 in words is "twelve million, five hundred twenty thousand, nine hundred eighty-nine".