1689025 has 12 divisors (see below), whose sum is σ = 2255932. Its totient is φ = 1247040.

The previous prime is 1688987. The next prime is 1689031. The reversal of 1689025 is 5209861.

It can be written as a sum of positive squares in 6 ways, for example, as 207936 + 1481089 = 456^2 + 1217^2 .

It is not a de Polignac number, because 1689025 - 2¹⁵ = 1656257 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 Duffinian number.

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, 2274 + ... + 2923.

2^1689025 is an apocalyptic number.

It is an amenable number.

1689025 is a deficient number, since it is larger than the sum of its proper divisors (566907).

1689025 is a wasteful number, since it uses less digits than its factorization.

1689025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220 (or 5215 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1689025 is about 1299.6249458979. The cubic root of 1689025 is about 119.0909316050.

The spelling of 1689025 in words is "one million, six hundred eighty-nine thousand, twenty-five".