1232664521 has 16 divisors (see below), whose sum is σ = 1369638720. Its totient is φ = 1099902720.

The previous prime is 1232664493. The next prime is 1232664523. The reversal of 1232664521 is 1254662321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232664521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232664523) 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, 617501 + ... + 619493.

It is an arithmetic number, because the mean of its divisors is an integer number (85602420).

Almost surely, 2^1232664521 is an apocalyptic number.

1232664521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1232664521 is a deficient number, since it is larger than the sum of its proper divisors (136974199).

1232664521 is a wasteful number, since it uses less digits than its factorization.

1232664521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016.

The product of its digits is 17280, while the sum is 32.

The square root of 1232664521 is about 35109.3224229691. The cubic root of 1232664521 is about 1072.2143913046.

The spelling of 1232664521 in words is "one billion, two hundred thirty-two million, six hundred sixty-four thousand, five hundred twenty-one".