525407 has 4 divisors (see below), whose sum is σ = 553080. Its totient is φ = 497736.

The previous prime is 525397. The next prime is 525409. The reversal of 525407 is 704525.

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

It is a cyclic number.

It is not a de Polignac number, because 525407 - 2⁴ = 525391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525409) 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, 13808 + ... + 13845.

It is an arithmetic number, because the mean of its divisors is an integer number (138270).

2⁵²⁵⁴⁰⁷ is an apocalyptic number.

525407 is a deficient number, since it is larger than the sum of its proper divisors (27673).

525407 is a wasteful number, since it uses less digits than its factorization.

525407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27672.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 525407 is about 724.8496395805. The cubic root of 525407 is about 80.6922734390.

The spelling of 525407 in words is "five hundred twenty-five thousand, four hundred seven".