425881 has 4 divisors (see below), whose sum is σ = 429264. Its totient is φ = 422500.

The previous prime is 425879. The next prime is 425899. The reversal of 425881 is 188524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a 4-Lehmer number, since φ(425881) divides (425881-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 425881 - 2¹ = 425879 is a prime.

It is a super-2 number, since 2×425881² = 362749252322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425801) 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 3 ways as a sum of consecutive naturals, for example, 1495 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (107316).

2⁴²⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

425881 is a deficient number, since it is larger than the sum of its proper divisors (3383).

425881 is a wasteful number, since it uses less digits than its factorization.

425881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382.

The product of its digits is 2560, while the sum is 28.

The square root of 425881 is about 652.5955868683. The cubic root of 425881 is about 75.2366451284.

The spelling of 425881 in words is "four hundred twenty-five thousand, eight hundred eighty-one".