425637 has 6 divisors (see below), whose sum is σ = 614822. Its totient is φ = 283752.

The previous prime is 425609. The next prime is 425641. The reversal of 425637 is 736524.

It is a happy number.

425637 is a `hidden beast` number, since 4 + 25 + 637 = 666.

It can be written as a sum of positive squares in only one way, i.e., 370881 + 54756 = 609^2 + 234^2 .

It is a de Polignac number, because none of the positive numbers 2^k-425637 is a prime.

It is a super-3 number, since 3×425637³ = 231333950966849559, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

425637 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 425637.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425637.

It is not an unprimeable number, because it can be changed into a prime (425237) 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, 23638 + ... + 23655.

2⁴²⁵⁶³⁷ is an apocalyptic number.

It is an amenable number.

425637 is a deficient number, since it is larger than the sum of its proper divisors (189185).

425637 is a wasteful number, since it uses less digits than its factorization.

425637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47299 (or 47296 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 425637 is about 652.4086142902. The cubic root of 425637 is about 75.2222739398. Note that the first 4 decimals are identical.

The spelling of 425637 in words is "four hundred twenty-five thousand, six hundred thirty-seven".