12563998 has 8 divisors (see below), whose sum is σ = 19284408. Its totient is φ = 6135864.

The previous prime is 12563977. The next prime is 12564001. The reversal of 12563998 is 89936521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72961 + ... + 73132.

It is an arithmetic number, because the mean of its divisors is an integer number (2410551).

Almost surely, 2^12563998 is an apocalyptic number.

12563998 is a deficient number, since it is larger than the sum of its proper divisors (6720410).

12563998 is a wasteful number, since it uses less digits than its factorization.

12563998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146138.

The product of its digits is 116640, while the sum is 43.

The square root of 12563998 is about 3544.5730349366. The cubic root of 12563998 is about 232.4748375282.

The spelling of 12563998 in words is "twelve million, five hundred sixty-three thousand, nine hundred ninety-eight".