12961231 has 8 divisors (see below), whose sum is σ = 13536720. Its totient is φ = 12394368.

The previous prime is 12961187. The next prime is 12961243. The reversal of 12961231 is 13216921.

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

It is not a de Polignac number, because 12961231 - 2⁹ = 12960719 is a prime.

It is a super-2 number, since 2×12961231² = 335987018070722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12961196 and 12961205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961931) 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, 1015 + ... + 5191.

It is an arithmetic number, because the mean of its divisors is an integer number (1692090).

Almost surely, 2^12961231 is an apocalyptic number.

12961231 is a deficient number, since it is larger than the sum of its proper divisors (575489).

12961231 is a wasteful number, since it uses less digits than its factorization.

12961231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313.

The product of its digits is 648, while the sum is 25.

The square root of 12961231 is about 3600.1709681625. The cubic root of 12961231 is about 234.8994952749.

The spelling of 12961231 in words is "twelve million, nine hundred sixty-one thousand, two hundred thirty-one".