609925 has 12 divisors (see below), whose sum is σ = 781696. Its totient is φ = 471600.

The previous prime is 609923. The next prime is 609929. The reversal of 609925 is 529906.

609925 = 85² + 86² + ... + 134².

It is not a de Polignac number, because 609925 - 2¹ = 609923 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

609925 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382 + ... + 1168.

2⁶⁰⁹⁹²⁵ is an apocalyptic number.

It is an amenable number.

609925 is a deficient number, since it is larger than the sum of its proper divisors (171771).

609925 is a wasteful number, since it uses less digits than its factorization.

609925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 609925 is about 780.9769522848. The cubic root of 609925 is about 84.8057849530.

The spelling of 609925 in words is "six hundred nine thousand, nine hundred twenty-five".