690525 has 60 divisors (see below), whose sum is σ = 1440384. Its totient is φ = 324000.

The previous prime is 690511. The next prime is 690533. The reversal of 690525 is 525096.

690525 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690525 - 2⁴ = 690509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

690525 is strictly pandigital in base 7.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 22260 + ... + 22290.

2⁶⁹⁰⁵²⁵ is an apocalyptic number.

It is an amenable number.

690525 is an abundant number, since it is smaller than the sum of its proper divisors (749859).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690525 is a wasteful number, since it uses less digits than its factorization.

690525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 690525 is about 830.9783390679. The cubic root of 690525 is about 88.3879650972.

The spelling of 690525 in words is "six hundred ninety thousand, five hundred twenty-five".