12409864 has 16 divisors (see below), whose sum is σ = 24637500. Its totient is φ = 5839872.

The previous prime is 12409849. The next prime is 12409879. The reversal of 12409864 is 46890421.

It is an interprime number because it is at equal distance from previous prime (12409849) and next prime (12409879).

It can be written as a sum of positive squares in 2 ways, for example, as 11847364 + 562500 = 3442^2 + 750^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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 in 3 ways as a sum of consecutive naturals, for example, 45489 + ... + 45760.

Almost surely, 2^12409864 is an apocalyptic number.

It is an amenable number.

12409864 is a deficient number, since it is larger than the sum of its proper divisors (12227636).

12409864 is a wasteful number, since it uses less digits than its factorization.

12409864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91272 (or 91268 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 12409864 is about 3522.7636877883. The cubic root of 12409864 is about 231.5202631278.

The spelling of 12409864 in words is "twelve million, four hundred nine thousand, eight hundred sixty-four".