690025 has 12 divisors (see below), whose sum is σ = 978112. Its totient is φ = 473040.

The previous prime is 689987. The next prime is 690037. The reversal of 690025 is 520096.

690025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690025 - 2¹¹ = 687977 is a prime.

It is a super-2 number, since 2×690025² = 952269001250, which contains 22 as substring.

It is a Duffinian number.

690025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 689978 and 690005.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1797 + ... + 2146.

2⁶⁹⁰⁰²⁵ is an apocalyptic number.

It is an amenable number.

690025 is a deficient number, since it is larger than the sum of its proper divisors (288087).

690025 is a wasteful number, since it uses less digits than its factorization.

690025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960 (or 3955 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 690025 is about 830.6774343871. The cubic root of 690025 is about 88.3666264280.

Adding to 690025 its reverse (520096), we get a palindrome (1210121).

The spelling of 690025 in words is "six hundred ninety thousand, twenty-five".