3976521 has 16 divisors (see below), whose sum is σ = 5675904. Its totient is φ = 2467584.

The previous prime is 3976519. The next prime is 3976523. The reversal of 3976521 is 1256793.

It is an interprime number because it is at equal distance from previous prime (3976519) and next prime (3976523).

It is not a de Polignac number, because 3976521 - 2¹ = 3976519 is a prime.

3976521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3976523) 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, 4875 + ... + 5631.

It is an arithmetic number, because the mean of its divisors is an integer number (354744).

Almost surely, 2^3976521 is an apocalyptic number.

It is an amenable number.

3976521 is a deficient number, since it is larger than the sum of its proper divisors (1699383).

3976521 is a wasteful number, since it uses less digits than its factorization.

3976521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 11340, while the sum is 33.

The square root of 3976521 is about 1994.1216111361. The cubic root of 3976521 is about 158.4289072714.

The spelling of 3976521 in words is "three million, nine hundred seventy-six thousand, five hundred twenty-one".