3525621 has 16 divisors (see below), whose sum is σ = 5399040. Its totient is φ = 2023920.

The previous prime is 3525593. The next prime is 3525623. The reversal of 3525621 is 1265253.

It is not a de Polignac number, because 3525621 - 2¹³ = 3517429 is a prime.

It is an Ulam number.

3525621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3525591 and 3525600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3525623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2185 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (337440).

Almost surely, 2^3525621 is an apocalyptic number.

It is an amenable number.

3525621 is a deficient number, since it is larger than the sum of its proper divisors (1873419).

3525621 is a wasteful number, since it uses less digits than its factorization.

3525621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656.

The product of its digits is 1800, while the sum is 24.

The square root of 3525621 is about 1877.6637079094. The cubic root of 3525621 is about 152.1990265645.

The spelling of 3525621 in words is "three million, five hundred twenty-five thousand, six hundred twenty-one".