525091 has 4 divisors (see below), whose sum is σ = 600112. Its totient is φ = 450072.

The previous prime is 525043. The next prime is 525101. The reversal of 525091 is 190525.

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

It is not a de Polignac number, because 525091 - 2⁷ = 524963 is a prime.

It is a Duffinian number.

525091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (525001) 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, 37500 + ... + 37513.

It is an arithmetic number, because the mean of its divisors is an integer number (150028).

2⁵²⁵⁰⁹¹ is an apocalyptic number.

525091 is a deficient number, since it is larger than the sum of its proper divisors (75021).

525091 is an equidigital number, since it uses as much as digits as its factorization.

525091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75020.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 525091 is about 724.6316305544. The cubic root of 525091 is about 80.6760930480.

The spelling of 525091 in words is "five hundred twenty-five thousand, ninety-one".