425531 has 4 divisors (see below), whose sum is σ = 428064. Its totient is φ = 423000.

The previous prime is 425521. The next prime is 425533. The reversal of 425531 is 135524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425531 is a prime.

It is a super-2 number, since 2×425531² = 362153263922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (425533) 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, 995 + ... + 1356.

It is an arithmetic number, because the mean of its divisors is an integer number (107016).

2⁴²⁵⁵³¹ is an apocalyptic number.

425531 is a deficient number, since it is larger than the sum of its proper divisors (2533).

425531 is a wasteful number, since it uses less digits than its factorization.

425531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532.

The product of its digits is 600, while the sum is 20.

The square root of 425531 is about 652.3273718004. The cubic root of 425531 is about 75.2160290073.

The spelling of 425531 in words is "four hundred twenty-five thousand, five hundred thirty-one".