525423 has 4 divisors (see below), whose sum is σ = 700568. Its totient is φ = 350280.

The previous prime is 525409. The next prime is 525431. The reversal of 525423 is 324525.

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

It is not a de Polignac number, because 525423 - 2⁵ = 525391 is a prime.

It is a d-powerful number, because it can be written as 5 + 2¹⁸ + 4⁵ + 5² + 2¹⁸ + 3⁴ .

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87568 + ... + 87573.

It is an arithmetic number, because the mean of its divisors is an integer number (175142).

2⁵²⁵⁴²³ is an apocalyptic number.

525423 is a deficient number, since it is larger than the sum of its proper divisors (175145).

525423 is a wasteful number, since it uses less digits than its factorization.

525423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175144.

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

The square root of 525423 is about 724.8606762682. The cubic root of 525423 is about 80.6930925268.

Adding to 525423 its reverse (324525), we get a palindrome (849948).

The spelling of 525423 in words is "five hundred twenty-five thousand, four hundred twenty-three".