425581 has 8 divisors (see below), whose sum is σ = 482720. Its totient is φ = 371952.

The previous prime is 425563. The next prime is 425591. The reversal of 425581 is 185524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 425581 - 2⁵ = 425549 is a prime.

It is a super-2 number, since 2×425581² = 362238375122, 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 (425501) 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 7 ways as a sum of consecutive naturals, for example, 615 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (60340).

2⁴²⁵⁵⁸¹ is an apocalyptic number.

It is an amenable number.

425581 is a deficient number, since it is larger than the sum of its proper divisors (57139).

425581 is a wasteful number, since it uses less digits than its factorization.

425581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its digits is 1600, while the sum is 25.

The square root of 425581 is about 652.3656949902. The cubic root of 425581 is about 75.2189748594.

The spelling of 425581 in words is "four hundred twenty-five thousand, five hundred eighty-one".