12212864 has 16 divisors (see below), whose sum is σ = 24330570. Its totient is φ = 6106368.

The previous prime is 12212861. The next prime is 12212867. The reversal of 12212864 is 46821221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12212861) and next prime (12212867).

It can be written as a sum of positive squares in only one way, i.e., 11560000 + 652864 = 3400^2 + 808^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (12212861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47579 + ... + 47834.

Almost surely, 2^12212864 is an apocalyptic number.

It is an amenable number.

12212864 is a deficient number, since it is larger than the sum of its proper divisors (12117706).

12212864 is an frugal number, since it uses more digits than its factorization.

12212864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95427 (or 95415 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 12212864 is about 3494.6908303883. The cubic root of 12212864 is about 230.2886357382.

The spelling of 12212864 in words is "twelve million, two hundred twelve thousand, eight hundred sixty-four".