12989925 has 36 divisors (see below), whose sum is σ = 25061764. Its totient is φ = 6393600.

The previous prime is 12989897. The next prime is 12989927. The reversal of 12989925 is 52998921.

12989925 = 485² + 486² + ... + 534².

It can be written as a sum of positive squares in 6 ways, for example, as 1920996 + 11068929 = 1386^2 + 3327^2 .

It is not a de Polignac number, because 12989925 - 2⁶ = 12989861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 705 + ... + 5145.

Almost surely, 2^12989925 is an apocalyptic number.

12989925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12989925 is a deficient number, since it is larger than the sum of its proper divisors (12071839).

12989925 is a wasteful number, since it uses less digits than its factorization.

12989925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470 (or 4462 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 12989925 is about 3604.1538535418. The cubic root of 12989925 is about 235.0727102607.

The spelling of 12989925 in words is "twelve million, nine hundred eighty-nine thousand, nine hundred twenty-five".