12195864 has 48 divisors (see below), whose sum is σ = 33345000. Its totient is φ = 4026624.

The previous prime is 12195857. The next prime is 12195881. The reversal of 12195864 is 46859121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7387 + ... + 8885.

Almost surely, 2^12195864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12195864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16672500).

12195864 is an abundant number, since it is smaller than the sum of its proper divisors (21149136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12195864 is a wasteful number, since it uses less digits than its factorization.

12195864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1617 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12195864 is about 3492.2577224483. The cubic root of 12195864 is about 230.1817341220.

The spelling of 12195864 in words is "twelve million, one hundred ninety-five thousand, eight hundred sixty-four".