1645525 has 12 divisors (see below), whose sum is σ = 2332192. Its totient is φ = 1128240.

The previous prime is 1645499. The next prime is 1645529. The reversal of 1645525 is 5255461.

It is not a de Polignac number, because 1645525 - 2¹⁷ = 1514453 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1645493 and 1645502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4527 + ... + 4876.

2^1645525 is an apocalyptic number.

It is an amenable number.

1645525 is a deficient number, since it is larger than the sum of its proper divisors (686667).

1645525 is an equidigital number, since it uses as much as digits as its factorization.

1645525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9420 (or 9415 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 1645525 is about 1282.7801838195. The cubic root of 1645525 is about 118.0596509665.

The spelling of 1645525 in words is "one million, six hundred forty-five thousand, five hundred twenty-five".