1685422825 has 12 divisors (see below), whose sum is σ = 2099057740. Its totient is φ = 1342445760.

The previous prime is 1685422807. The next prime is 1685422859. The reversal of 1685422825 is 5282245861.

It can be written as a sum of positive squares in 6 ways, for example, as 15147664 + 1670275161 = 3892^2 + 40869^2 .

It is not a de Polignac number, because 1685422825 - 2²³ = 1677034217 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, 141474 + ... + 152923.

Almost surely, 2^1685422825 is an apocalyptic number.

It is an amenable number.

1685422825 is a deficient number, since it is larger than the sum of its proper divisors (413634915).

1685422825 is a wasteful number, since it uses less digits than its factorization.

1685422825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294636 (or 294631 counting only the distinct ones).

The product of its digits is 307200, while the sum is 43.

The square root of 1685422825 is about 41053.9014589357. The cubic root of 1685422825 is about 1190.0620980706.

The spelling of 1685422825 in words is "one billion, six hundred eighty-five million, four hundred twenty-two thousand, eight hundred twenty-five".