12161572 has 24 divisors (see below), whose sum is σ = 22550976. Its totient is φ = 5726688.

The previous prime is 12161563. The next prime is 12161573. The reversal of 12161572 is 27516121.

It is a super-2 number, since 2×12161572² = 295807667022368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12161573) 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, 5178 + ... + 7150.

It is an arithmetic number, because the mean of its divisors is an integer number (939624).

Almost surely, 2^12161572 is an apocalyptic number.

It is an amenable number.

12161572 is a deficient number, since it is larger than the sum of its proper divisors (10389404).

12161572 is a wasteful number, since it uses less digits than its factorization.

12161572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067 (or 2065 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 12161572 is about 3487.3445485068. The cubic root of 12161572 is about 229.9657920139.

Adding to 12161572 its reverse (27516121), we get a palindrome (39677693).

The spelling of 12161572 in words is "twelve million, one hundred sixty-one thousand, five hundred seventy-two".