3961321 has 16 divisors (see below), whose sum is σ = 4935168. Its totient is φ = 3096000.

The previous prime is 3961283. The next prime is 3961327. The reversal of 3961321 is 1231693.

It is a cyclic number.

It is not a de Polignac number, because 3961321 - 2⁷ = 3961193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8976 + ... + 9406.

It is an arithmetic number, because the mean of its divisors is an integer number (308448).

Almost surely, 2^3961321 is an apocalyptic number.

It is an amenable number.

3961321 is a deficient number, since it is larger than the sum of its proper divisors (973847).

3961321 is a wasteful number, since it uses less digits than its factorization.

3961321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its digits is 972, while the sum is 25.

The square root of 3961321 is about 1990.3067602759. The cubic root of 3961321 is about 158.2267880305.

The spelling of 3961321 in words is "three million, nine hundred sixty-one thousand, three hundred twenty-one".