3974321 has 4 divisors (see below), whose sum is σ = 4280052. Its totient is φ = 3668592.

The previous prime is 3974309. The next prime is 3974351. The reversal of 3974321 is 1234793.

3974321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2436721 + 1537600 = 1561^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 3974321 - 2¹⁰ = 3973297 is a prime.

It is a super-2 number, since 2×3974321² = 31590454822082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3974351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152846 + ... + 152871.

It is an arithmetic number, because the mean of its divisors is an integer number (1070013).

Almost surely, 2^3974321 is an apocalyptic number.

It is an amenable number.

3974321 is a deficient number, since it is larger than the sum of its proper divisors (305731).

3974321 is a wasteful number, since it uses less digits than its factorization.

3974321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305730.

The product of its digits is 4536, while the sum is 29.

The square root of 3974321 is about 1993.5699134969. The cubic root of 3974321 is about 158.3996850868.

The spelling of 3974321 in words is "three million, nine hundred seventy-four thousand, three hundred twenty-one".