12400929 has 6 divisors (see below), whose sum is σ = 17912466. Its totient is φ = 8267280.

The previous prime is 12400909. The next prime is 12400943. The reversal of 12400929 is 92900421.

12400929 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6640929 + 5760000 = 2577^2 + 2400^2 .

It is not a de Polignac number, because 12400929 - 2⁵ = 12400897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12400909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688932 + ... + 688949.

It is an arithmetic number, because the mean of its divisors is an integer number (2985411).

Almost surely, 2^12400929 is an apocalyptic number.

It is an amenable number.

12400929 is a deficient number, since it is larger than the sum of its proper divisors (5511537).

12400929 is a wasteful number, since it uses less digits than its factorization.

12400929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377887 (or 1377884 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12400929 is about 3521.4952789973. The cubic root of 12400929 is about 231.4646855589.

The spelling of 12400929 in words is "twelve million, four hundred thousand, nine hundred twenty-nine".