426624521 has 2 divisors, whose sum is σ = 426624522. Its totient is φ = 426624520.

The previous prime is 426624479. The next prime is 426624529. The reversal of 426624521 is 125426624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392238025 + 34386496 = 19805^2 + 5864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426624521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426624529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213312260 + 213312261.

It is an arithmetic number, because the mean of its divisors is an integer number (213312261).

Almost surely, 2^426624521 is an apocalyptic number.

It is an amenable number.

426624521 is a deficient number, since it is larger than the sum of its proper divisors (1).

426624521 is an equidigital number, since it uses as much as digits as its factorization.

426624521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 32.

The square root of 426624521 is about 20654.8909704215. The cubic root of 426624521 is about 752.8040344194.

The spelling of 426624521 in words is "four hundred twenty-six million, six hundred twenty-four thousand, five hundred twenty-one".