3673521 has 6 divisors (see below), whose sum is σ = 5306210. Its totient is φ = 2449008.

The previous prime is 3673519. The next prime is 3673529. The reversal of 3673521 is 1253763.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3381921 + 291600 = 1839^2 + 540^2 .

It is not a de Polignac number, because 3673521 - 2¹ = 3673519 is a prime.

It is a Duffinian number.

3673521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3673529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204076 + ... + 204093.

Almost surely, 2^3673521 is an apocalyptic number.

It is an amenable number.

3673521 is a deficient number, since it is larger than the sum of its proper divisors (1632689).

3673521 is a wasteful number, since it uses less digits than its factorization.

3673521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408175 (or 408172 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 3673521 is about 1916.6431592761. The cubic root of 3673521 is about 154.2981938024.

The spelling of 3673521 in words is "three million, six hundred seventy-three thousand, five hundred twenty-one".