1685672 has 8 divisors (see below), whose sum is σ = 3160650. Its totient is φ = 842832.

The previous prime is 1685627. The next prime is 1685681. The reversal of 1685672 is 2765861.

It can be written as a sum of positive squares in only one way, i.e., 1674436 + 11236 = 1294^2 + 106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105347 + ... + 105362.

2^1685672 is an apocalyptic number.

It is an amenable number.

1685672 is a deficient number, since it is larger than the sum of its proper divisors (1474978).

1685672 is a wasteful number, since it uses less digits than its factorization.

1685672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210715 (or 210711 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 1685672 is about 1298.3343175007. The cubic root of 1685672 is about 119.0120741933.

The spelling of 1685672 in words is "one million, six hundred eighty-five thousand, six hundred seventy-two".