12117572 has 12 divisors (see below), whose sum is σ = 21699216. Its totient is φ = 5917800.

The previous prime is 12117571. The next prime is 12117607. The reversal of 12117572 is 27571121.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12117571) by changing a digit.

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, 35054 + ... + 35397.

It is an arithmetic number, because the mean of its divisors is an integer number (1808268).

Almost surely, 2^12117572 is an apocalyptic number.

It is an amenable number.

12117572 is a deficient number, since it is larger than the sum of its proper divisors (9581644).

12117572 is a wasteful number, since it uses less digits than its factorization.

12117572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70498 (or 70496 counting only the distinct ones).

The product of its digits is 980, while the sum is 26.

The square root of 12117572 is about 3481.0303072510. The cubic root of 12117572 is about 229.6881217099.

Adding to 12117572 its reverse (27571121), we get a palindrome (39688693).

It can be divided in two parts, 121 and 17572, that multiplied together give a palindrome (2126212).

The spelling of 12117572 in words is "twelve million, one hundred seventeen thousand, five hundred seventy-two".