3960321 has 4 divisors (see below), whose sum is σ = 5280432. Its totient is φ = 2640212.

The previous prime is 3960317. The next prime is 3960329. The reversal of 3960321 is 1230693.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1230693 = 3 ⋅410231.

It is a cyclic number.

It is not a de Polignac number, because 3960321 - 2² = 3960317 is a prime.

It is a D-number.

3960321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3960291 and 3960300.

It is not an unprimeable number, because it can be changed into a prime (3960329) 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, 660051 + ... + 660056.

It is an arithmetic number, because the mean of its divisors is an integer number (1320108).

Almost surely, 2^3960321 is an apocalyptic number.

It is an amenable number.

3960321 is a deficient number, since it is larger than the sum of its proper divisors (1320111).

3960321 is a wasteful number, since it uses less digits than its factorization.

3960321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320110.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 3960321 is about 1990.0555268635. The cubic root of 3960321 is about 158.2134725983.

The spelling of 3960321 in words is "three million, nine hundred sixty thousand, three hundred twenty-one".