426946581 has 6 divisors (see below), whose sum is σ = 616700630. Its totient is φ = 284631048.

The previous prime is 426946577. The next prime is 426946603. The reversal of 426946581 is 185649624.

426946581 is a `hidden beast` number, since 4 + 2 + 69 + 4 + 6 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 310112100 + 116834481 = 17610^2 + 10809^2 .

It is not a de Polignac number, because 426946581 - 2² = 426946577 is a prime.

It is a super-2 number, since 2×426946581² = 364566766055179122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426946781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23719246 + ... + 23719263.

Almost surely, 2^426946581 is an apocalyptic number.

It is an amenable number.

426946581 is a deficient number, since it is larger than the sum of its proper divisors (189754049).

426946581 is a wasteful number, since it uses less digits than its factorization.

426946581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47438515 (or 47438512 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 426946581 is about 20662.6857160438. The cubic root of 426946581 is about 752.9934180364.

The spelling of 426946581 in words is "four hundred twenty-six million, nine hundred forty-six thousand, five hundred eighty-one".