12209972 has 12 divisors (see below), whose sum is σ = 21588420. Its totient is φ = 6041856.

The previous prime is 12209971. The next prime is 12209993. The reversal of 12209972 is 27990221.

It can be written as a sum of positive squares in 2 ways, for example, as 5635876 + 6574096 = 2374^2 + 2564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209971) 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, 15347 + ... + 16122.

It is an arithmetic number, because the mean of its divisors is an integer number (1799035).

Almost surely, 2^12209972 is an apocalyptic number.

It is an amenable number.

12209972 is a deficient number, since it is larger than the sum of its proper divisors (9378448).

12209972 is a wasteful number, since it uses less digits than its factorization.

12209972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31570 (or 31568 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 12209972 is about 3494.2770353823. The cubic root of 12209972 is about 230.2704568925.

The spelling of 12209972 in words is "twelve million, two hundred nine thousand, nine hundred seventy-two".