3671521 has 6 divisors (see below), whose sum is σ = 4271010. Its totient is φ = 3146976.

The previous prime is 3671501. The next prime is 3671527. The reversal of 3671521 is 1251763.

It can be written as a sum of positive squares in only one way, i.e., 3651921 + 19600 = 1911^2 + 140^2 .

It is not a de Polignac number, because 3671521 - 2¹¹ = 3669473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3671527) 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, 37416 + ... + 37513.

It is an arithmetic number, because the mean of its divisors is an integer number (711835).

Almost surely, 2^3671521 is an apocalyptic number.

It is an amenable number.

3671521 is a deficient number, since it is larger than the sum of its proper divisors (599489).

3671521 is an equidigital number, since it uses as much as digits as its factorization.

3671521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74943 (or 74936 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 3671521 is about 1916.1213427129. The cubic root of 3671521 is about 154.2701868478.

The spelling of 3671521 in words is "three million, six hundred seventy-one thousand, five hundred twenty-one".