425523 has 16 divisors (see below), whose sum is σ = 677376. Its totient is φ = 232320.

The previous prime is 425521. The next prime is 425533. The reversal of 425523 is 325524.

It is not a de Polignac number, because 425523 - 2¹ = 425521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 425523.

It is not an unprimeable number, because it can be changed into a prime (425521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43 + ... + 923.

It is an arithmetic number, because the mean of its divisors is an integer number (42336).

2⁴²⁵⁵²³ is an apocalyptic number.

425523 is a deficient number, since it is larger than the sum of its proper divisors (251853).

425523 is a wasteful number, since it uses less digits than its factorization.

425523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914.

The product of its digits is 1200, while the sum is 21.

The square root of 425523 is about 652.3212398811. The cubic root of 425523 is about 75.2155576496.

Subtracting from 425523 its reverse (325524), we obtain a palindrome (99999).

It can be divided in two parts, 4255 and 23, that added together give a triangular number (4278 = T₉₂).

The spelling of 425523 in words is "four hundred twenty-five thousand, five hundred twenty-three".