3933521 has 4 divisors (see below), whose sum is σ = 3938544. Its totient is φ = 3928500.

The previous prime is 3933509. The next prime is 3933539. The reversal of 3933521 is 1253393.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3933521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3933221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055 + ... + 2996.

It is an arithmetic number, because the mean of its divisors is an integer number (984636).

Almost surely, 2^3933521 is an apocalyptic number.

It is an amenable number.

3933521 is a deficient number, since it is larger than the sum of its proper divisors (5023).

3933521 is an equidigital number, since it uses as much as digits as its factorization.

3933521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022.

The product of its digits is 2430, while the sum is 26.

The square root of 3933521 is about 1983.3106161164. The cubic root of 3933521 is about 157.8557809139.

The spelling of 3933521 in words is "three million, nine hundred thirty-three thousand, five hundred twenty-one".