1660525 has 12 divisors (see below), whose sum is σ = 2079232. Its totient is φ = 1315440.

The previous prime is 1660517. The next prime is 1660553. The reversal of 1660525 is 5250661.

1660525 = T₉₄ + T₉₅ + ... + T₂₂₀.

It is not a de Polignac number, because 1660525 - 2³ = 1660517 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660525.

It is a congruent 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, 2914 + ... + 3436.

2^1660525 is an apocalyptic number.

It is an amenable number.

1660525 is a deficient number, since it is larger than the sum of its proper divisors (418707).

1660525 is a wasteful number, since it uses less digits than its factorization.

1660525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1660525 is about 1288.6135960791. The cubic root of 1660525 is about 118.4172958739.

The spelling of 1660525 in words is "one million, six hundred sixty thousand, five hundred twenty-five".