12999428 has 12 divisors (see below), whose sum is σ = 24499020. Its totient is φ = 5999712.

The previous prime is 12999421. The next prime is 12999431. The reversal of 12999428 is 82499921.

It can be written as a sum of positive squares in 2 ways, for example, as 2553604 + 10445824 = 1598^2 + 3232^2 .

It is not an unprimeable number, because it can be changed into a prime (12999421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124943 + ... + 125046.

It is an arithmetic number, because the mean of its divisors is an integer number (2041585).

Almost surely, 2^12999428 is an apocalyptic number.

It is an amenable number.

12999428 is a deficient number, since it is larger than the sum of its proper divisors (11499592).

12999428 is a wasteful number, since it uses less digits than its factorization.

12999428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250006 (or 250004 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 12999428 is about 3605.4719524634. The cubic root of 12999428 is about 235.1300200973.

The spelling of 12999428 in words is "twelve million, nine hundred ninety-nine thousand, four hundred twenty-eight".