425670 has 32 divisors (see below), whose sum is σ = 1168128. Its totient is φ = 97248.

The previous prime is 425653. The next prime is 425681. The reversal of 425670 is 76524.

It is a happy number.

It is a super-4 number, since 4×425670⁴ (a number of 24 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 425670.

It is a congruent number.

It is an unprimeable number.

425670 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (36504).

2⁴²⁵⁶⁷⁰ is an apocalyptic number.

425670 is an abundant number, since it is smaller than the sum of its proper divisors (742458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

425670 is a wasteful number, since it uses less digits than its factorization.

425670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 425670 is about 652.4339046984. The cubic root of 425670 is about 75.2242179053.

Adding to 425670 its product of nonzero digits (1680), we get a triangular number (427350 = T₉₂₄).

The spelling of 425670 in words is "four hundred twenty-five thousand, six hundred seventy".