12563971 has 8 divisors (see below), whose sum is σ = 14387040. Its totient is φ = 10747968.

The previous prime is 12563963. The next prime is 12563977. The reversal of 12563971 is 17936521.

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

It is not a de Polignac number, because 12563971 - 2³ = 12563963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12563977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2865 + ... + 5773.

It is an arithmetic number, because the mean of its divisors is an integer number (1798380).

Almost surely, 2^12563971 is an apocalyptic number.

12563971 is a deficient number, since it is larger than the sum of its proper divisors (1823069).

12563971 is an equidigital number, since it uses as much as digits as its factorization.

12563971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533.

The product of its digits is 11340, while the sum is 34.

The square root of 12563971 is about 3544.5692262953. The cubic root of 12563971 is about 232.4746709988.

The spelling of 12563971 in words is "twelve million, five hundred sixty-three thousand, nine hundred seventy-one".