426245681 has 2 divisors, whose sum is σ = 426245682. Its totient is φ = 426245680.

The previous prime is 426245609. The next prime is 426245689. The reversal of 426245681 is 186542624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249355681 + 176890000 = 15791^2 + 13300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426245681 is a prime.

It is a super-2 number, since 2×426245681² = 363370761142307522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (426245689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213122840 + 213122841.

It is an arithmetic number, because the mean of its divisors is an integer number (213122841).

Almost surely, 2^426245681 is an apocalyptic number.

It is an amenable number.

426245681 is a deficient number, since it is larger than the sum of its proper divisors (1).

426245681 is an equidigital number, since it uses as much as digits as its factorization.

426245681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 38.

The square root of 426245681 is about 20645.7182243680. The cubic root of 426245681 is about 752.5811399502.

The spelling of 426245681 in words is "four hundred twenty-six million, two hundred forty-five thousand, six hundred eighty-one".