12249131 has 4 divisors (see below), whose sum is σ = 12312792. Its totient is φ = 12185472.

The previous prime is 12249121. The next prime is 12249143. The reversal of 12249131 is 13194221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13194221 = 661 ⋅19961.

It is a cyclic number.

It is not a de Polignac number, because 12249131 - 2⁶ = 12249067 is a prime.

It is a super-2 number, since 2×12249131² = 300082420510322, 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 = 12249097 and 12249106.

It is not an unprimeable number, because it can be changed into a prime (12249121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31541 + ... + 31926.

It is an arithmetic number, because the mean of its divisors is an integer number (3078198).

Almost surely, 2^12249131 is an apocalyptic number.

12249131 is a deficient number, since it is larger than the sum of its proper divisors (63661).

12249131 is an equidigital number, since it uses as much as digits as its factorization.

12249131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63660.

The product of its digits is 432, while the sum is 23.

The square root of 12249131 is about 3499.8758549411. The cubic root of 12249131 is about 230.5163634956.

The spelling of 12249131 in words is "twelve million, two hundred forty-nine thousand, one hundred thirty-one".