684425 has 12 divisors (see below), whose sum is σ = 970176. Its totient is φ = 469200.

The previous prime is 684419. The next prime is 684427. The reversal of 684425 is 524486.

It is not a de Polignac number, because 684425 - 2¹⁰ = 683401 is a prime.

It is a magnanimous number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 684425.

It is not an unprimeable number, because it can be changed into a prime (684427) 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, 1781 + ... + 2130.

It is an arithmetic number, because the mean of its divisors is an integer number (80848).

2⁶⁸⁴⁴²⁵ is an apocalyptic number.

It is an amenable number.

684425 is a deficient number, since it is larger than the sum of its proper divisors (285751).

684425 is a wasteful number, since it uses less digits than its factorization.

684425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928 (or 3923 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 684425 is about 827.2998247310. The cubic root of 684425 is about 88.1269260012.

The spelling of 684425 in words is "six hundred eighty-four thousand, four hundred twenty-five".