3802521 has 8 divisors (see below), whose sum is σ = 5290560. Its totient is φ = 2424752.

The previous prime is 3802511. The next prime is 3802523. The reversal of 3802521 is 1252083.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3802521 - 2¹¹ = 3800473 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3802523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27486 + ... + 27623.

It is an arithmetic number, because the mean of its divisors is an integer number (661320).

Almost surely, 2^3802521 is an apocalyptic number.

It is an amenable number.

3802521 is a deficient number, since it is larger than the sum of its proper divisors (1488039).

3802521 is a wasteful number, since it uses less digits than its factorization.

3802521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55135.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 3802521 is about 1950.0053846080. The cubic root of 3802521 is about 156.0835761895.

Subtracting from 3802521 its sum of digits (21), we obtain a square (3802500 = 1950²).

The spelling of 3802521 in words is "three million, eight hundred two thousand, five hundred twenty-one".