12249931 has 4 divisors (see below), whose sum is σ = 12338200. Its totient is φ = 12161664.

The previous prime is 12249917. The next prime is 12249947. The reversal of 12249931 is 13994221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13994221 = 43 ⋅325447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12249931 is a prime.

It is a super-2 number, since 2×12249931² = 300121619009522, 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 = 12249893 and 12249902.

It is not an unprimeable number, because it can be changed into a prime (12249971) 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, 43926 + ... + 44203.

It is an arithmetic number, because the mean of its divisors is an integer number (3084550).

Almost surely, 2^12249931 is an apocalyptic number.

12249931 is a deficient number, since it is larger than the sum of its proper divisors (88269).

12249931 is an equidigital number, since it uses as much as digits as its factorization.

12249931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88268.

The product of its digits is 3888, while the sum is 31.

The square root of 12249931 is about 3499.9901428433. The cubic root of 12249931 is about 230.5213817856.

The spelling of 12249931 in words is "twelve million, two hundred forty-nine thousand, nine hundred thirty-one".