12992138 has 8 divisors (see below), whose sum is σ = 19503588. Its totient is φ = 6490944.

The previous prime is 12992137. The next prime is 12992141. The reversal of 12992138 is 83129921.

12992138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12652249 + 339889 = 3557^2 + 583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12992138² = 337591299622088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12992098 and 12992107.

It is not an unprimeable number, because it can be changed into a prime (12992137) 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, 3170 + ... + 6002.

Almost surely, 2^12992138 is an apocalyptic number.

12992138 is a deficient number, since it is larger than the sum of its proper divisors (6511450).

12992138 is a wasteful number, since it uses less digits than its factorization.

12992138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128.

The product of its digits is 7776, while the sum is 35.

The square root of 12992138 is about 3604.4608473390. The cubic root of 12992138 is about 235.0860587177.

The spelling of 12992138 in words is "twelve million, nine hundred ninety-two thousand, one hundred thirty-eight".