3934521 has 8 divisors (see below), whose sum is σ = 5828960. Its totient is φ = 2622996.

The previous prime is 3934519. The next prime is 3934523. The reversal of 3934521 is 1254393.

It is an interprime number because it is at equal distance from previous prime (3934519) and next prime (3934523).

It is not a de Polignac number, because 3934521 - 2¹ = 3934519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 145723 = 3934521 / (3 + 9 + 3 + 4 + 5 + 2 + 1).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3934523) 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, 72835 + ... + 72888.

It is an arithmetic number, because the mean of its divisors is an integer number (728620).

Almost surely, 2^3934521 is an apocalyptic number.

It is an amenable number.

3934521 is a deficient number, since it is larger than the sum of its proper divisors (1894439).

3934521 is a wasteful number, since it uses less digits than its factorization.

3934521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145732 (or 145726 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 3934521 is about 1983.5627038236. The cubic root of 3934521 is about 157.8691567508.

The spelling of 3934521 in words is "three million, nine hundred thirty-four thousand, five hundred twenty-one".