685297225 has 12 divisors (see below), whose sum is σ = 894493840. Its totient is φ = 519382800.

The previous prime is 685297211. The next prime is 685297273. The reversal of 685297225 is 522792586.

It is not a de Polignac number, because 685297225 - 2⁷ = 685297097 is a prime.

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, 720891 + ... + 721840.

Almost surely, 2^685297225 is an apocalyptic number.

It is an amenable number.

685297225 is a deficient number, since it is larger than the sum of its proper divisors (209196615).

685297225 is a wasteful number, since it uses less digits than its factorization.

685297225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442760 (or 1442755 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 685297225 is about 26178.1822325386. The cubic root of 685297225 is about 881.6434616093.

The spelling of 685297225 in words is "six hundred eighty-five million, two hundred ninety-seven thousand, two hundred twenty-five".