12951920 has 40 divisors (see below), whose sum is σ = 31701840. Its totient is φ = 4907520.

The previous prime is 12951907. The next prime is 12951929. The reversal of 12951920 is 2915921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12951929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2741 + ... + 5780.

It is an arithmetic number, because the mean of its divisors is an integer number (792546).

Almost surely, 2^12951920 is an apocalyptic number.

12951920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12951920 is an abundant number, since it is smaller than the sum of its proper divisors (18749920).

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

12951920 is a wasteful number, since it uses less digits than its factorization.

12951920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553 (or 8547 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 12951920 is about 3598.8776028090. The cubic root of 12951920 is about 234.8432333057.

The spelling of 12951920 in words is "twelve million, nine hundred fifty-one thousand, nine hundred twenty".