12961138 has 8 divisors (see below), whose sum is σ = 19519920. Its totient is φ = 6454500.

The previous prime is 12961133. The next prime is 12961139. The reversal of 12961138 is 83116921.

12961138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (12961133) 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, 12408 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (2439990).

Almost surely, 2^12961138 is an apocalyptic number.

12961138 is a deficient number, since it is larger than the sum of its proper divisors (6558782).

12961138 is a wasteful number, since it uses less digits than its factorization.

12961138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26072.

The product of its digits is 2592, while the sum is 31.

The square root of 12961138 is about 3600.1580520860. The cubic root of 12961138 is about 234.8989334531.

The spelling of 12961138 in words is "twelve million, nine hundred sixty-one thousand, one hundred thirty-eight".