12321572 has 6 divisors (see below), whose sum is σ = 21562758. Its totient is φ = 6160784.

The previous prime is 12321571. The next prime is 12321577. The reversal of 12321572 is 27512321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10201636 + 2119936 = 3194^2 + 1456^2 .

It is a super-2 number, since 2×12321572² = 303642273102368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12321571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1540193 + ... + 1540200.

It is an arithmetic number, because the mean of its divisors is an integer number (3593793).

Almost surely, 2^12321572 is an apocalyptic number.

It is an amenable number.

12321572 is a deficient number, since it is larger than the sum of its proper divisors (9241186).

12321572 is a wasteful number, since it uses less digits than its factorization.

12321572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080397 (or 3080395 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 12321572 is about 3510.2096803467. The cubic root of 12321572 is about 230.9698929422.

Adding to 12321572 its reverse (27512321), we get a palindrome (39833893).

The spelling of 12321572 in words is "twelve million, three hundred twenty-one thousand, five hundred seventy-two".