685852425 has 36 divisors (see below), whose sum is σ = 1230254220. Its totient is φ = 365247360.

The previous prime is 685852421. The next prime is 685852441. The reversal of 685852425 is 524258586.

It is a happy number.

685852425 is a `hidden beast` number, since 68 + 585 + 2 + 4 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2134521 + 683717904 = 1461^2 + 26148^2 .

It is not a de Polignac number, because 685852425 - 2² = 685852421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (685852421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 184687 + ... + 188363.

Almost surely, 2^685852425 is an apocalyptic number.

It is an amenable number.

685852425 is a deficient number, since it is larger than the sum of its proper divisors (544401795).

685852425 is a wasteful number, since it uses less digits than its factorization.

685852425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522 (or 4514 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The square root of 685852425 is about 26188.7843360474. The cubic root of 685852425 is about 881.8814879253.

The spelling of 685852425 in words is "six hundred eighty-five million, eight hundred fifty-two thousand, four hundred twenty-five".