12592721 has 2 divisors, whose sum is σ = 12592722. Its totient is φ = 12592720.

The previous prime is 12592709. The next prime is 12592751. The reversal of 12592721 is 12729521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9579025 + 3013696 = 3095^2 + 1736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12592721 is a prime.

It is equal to p₈₂₄₃₅₇ and since 12592721 and 824357 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12592751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6296360 + 6296361.

It is an arithmetic number, because the mean of its divisors is an integer number (6296361).

Almost surely, 2^12592721 is an apocalyptic number.

It is an amenable number.

12592721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12592721 is an equidigital number, since it uses as much as digits as its factorization.

12592721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 12592721 is about 3548.6224087665. The cubic root of 12592721 is about 232.6518590132.

The spelling of 12592721 in words is "twelve million, five hundred ninety-two thousand, seven hundred twenty-one".