426580781 has 6 divisors (see below), whose sum is σ = 468886446. Its totient is φ = 387800600.

The previous prime is 426580753. The next prime is 426580787. The reversal of 426580781 is 187085624.

It can be written as a sum of positive squares in only one way, i.e., 423124900 + 3455881 = 20570^2 + 1859^2 .

It is a de Polignac number, because none of the positive numbers 2^k-426580781 is a prime.

It is a super-2 number, since 2×426580781² = 363942325437139922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426580787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1762610 + ... + 1762851.

It is an arithmetic number, because the mean of its divisors is an integer number (78147741).

Almost surely, 2^426580781 is an apocalyptic number.

It is an amenable number.

426580781 is a deficient number, since it is larger than the sum of its proper divisors (42305665).

426580781 is a wasteful number, since it uses less digits than its factorization.

426580781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525483 (or 3525472 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 426580781 is about 20653.8321141623. The cubic root of 426580781 is about 752.7783062734.

The spelling of 426580781 in words is "four hundred twenty-six million, five hundred eighty thousand, seven hundred eighty-one".