1680525 has 72 divisors (see below), whose sum is σ = 3791424. Its totient is φ = 691200.

The previous prime is 1680509. The next prime is 1680527. The reversal of 1680525 is 5250861.

It is not a de Polignac number, because 1680525 - 2⁴ = 1680509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680527) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17277 + ... + 17373.

2^1680525 is an apocalyptic number.

1680525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1680525 is an abundant number, since it is smaller than the sum of its proper divisors (2110899).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1680525 is a wasteful number, since it uses less digits than its factorization.

1680525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1680525 is about 1296.3506470087. The cubic root of 1680525 is about 118.8908209363.

The spelling of 1680525 in words is "one million, six hundred eighty thousand, five hundred twenty-five".