12147564 has 48 divisors (see below), whose sum is σ = 33304320. Its totient is φ = 3397440.

The previous prime is 12147563. The next prime is 12147587. The reversal of 12147564 is 46574121.

It is a super-2 number, since 2×12147564² = 295126622268192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12147563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1824 + ... + 5255.

It is an arithmetic number, because the mean of its divisors is an integer number (693840).

Almost surely, 2^12147564 is an apocalyptic number.

It is an amenable number.

12147564 is an abundant number, since it is smaller than the sum of its proper divisors (21156756).

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

12147564 is a wasteful number, since it uses less digits than its factorization.

12147564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110 (or 7108 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 12147564 is about 3485.3355649062. The cubic root of 12147564 is about 229.8774646601.

It can be divided in two parts, 1214 and 7564, that added together give a palindrome (8778).

The spelling of 12147564 in words is "twelve million, one hundred forty-seven thousand, five hundred sixty-four".