12131204 has 6 divisors (see below), whose sum is σ = 21229614. Its totient is φ = 6065600.

The previous prime is 12131179. The next prime is 12131219. The reversal of 12131204 is 40213121.

It can be written as a sum of positive squares in only one way, i.e., 10876804 + 1254400 = 3298^2 + 1120^2 .

It is a super-2 number, since 2×12131204² = 294332220979232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1516397 + ... + 1516404.

It is an arithmetic number, because the mean of its divisors is an integer number (3538269).

Almost surely, 2^12131204 is an apocalyptic number.

It is an amenable number.

12131204 is a deficient number, since it is larger than the sum of its proper divisors (9098410).

12131204 is a wasteful number, since it uses less digits than its factorization.

12131204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032805 (or 3032803 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12131204 is about 3482.9877978540. The cubic root of 12131204 is about 229.7742207807.

Adding to 12131204 its reverse (40213121), we get a palindrome (52344325).

The spelling of 12131204 in words is "twelve million, one hundred thirty-one thousand, two hundred four".