3073521 has 12 divisors (see below), whose sum is σ = 4504976. Its totient is φ = 1862520.

The previous prime is 3073517. The next prime is 3073529. The reversal of 3073521 is 1253703.

It is a happy number.

It is not a de Polignac number, because 3073521 - 2² = 3073517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3073529) 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, 3871 + ... + 4596.

Almost surely, 2^3073521 is an apocalyptic number.

It is an amenable number.

3073521 is a deficient number, since it is larger than the sum of its proper divisors (1431455).

3073521 is a wasteful number, since it uses less digits than its factorization.

3073521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8492 (or 8481 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 3073521 is about 1753.1460292856. The cubic root of 3073521 is about 145.3936351384.

It can be divided in two parts, 307 and 3521, that added together give a triangular number (3828 = T₈₇).

The spelling of 3073521 in words is "three million, seventy-three thousand, five hundred twenty-one".