3970321 has 2 divisors, whose sum is σ = 3970322. Its totient is φ = 3970320.

The previous prime is 3970313. The next prime is 3970331. The reversal of 3970321 is 1230793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 69696 = 1975^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 3970321 - 2³ = 3970313 is a prime.

It is not a weakly prime, because it can be changed into another prime (3970331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985160 + 1985161.

It is an arithmetic number, because the mean of its divisors is an integer number (1985161).

Almost surely, 2^3970321 is an apocalyptic number.

It is an amenable number.

3970321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3970321 is an equidigital number, since it uses as much as digits as its factorization.

3970321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 3970321 is about 1992.5664355298. The cubic root of 3970321 is about 158.3465262014.

The spelling of 3970321 in words is "three million, nine hundred seventy thousand, three hundred twenty-one".