525665 has 16 divisors (see below), whose sum is σ = 753408. Its totient is φ = 344256.

The previous prime is 525649. The next prime is 525671. The reversal of 525665 is 566525.

It is a cyclic number.

It is not a de Polignac number, because 525665 - 2⁴ = 525649 is a prime.

It is a d-powerful number, because it can be written as 5² + 2¹⁹ + 6 + 5² + 6⁴ + 5² .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (47088).

2⁵²⁵⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

525665 is a deficient number, since it is larger than the sum of its proper divisors (227743).

525665 is a wasteful number, since it uses less digits than its factorization.

525665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688.

The product of its digits is 9000, while the sum is 29.

The square root of 525665 is about 725.0275856821. The cubic root of 525665 is about 80.7054792013.

The spelling of 525665 in words is "five hundred twenty-five thousand, six hundred sixty-five".