3197921 has 8 divisors (see below), whose sum is σ = 3402504. Its totient is φ = 2995200.

The previous prime is 3197903. The next prime is 3197923. The reversal of 3197921 is 1297913.

3197921 = 1264² + 1265².

It is a happy number.

3197921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 429025 + 2768896 = 655^2 + 1664^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3197921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3197923) 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 7 ways as a sum of consecutive naturals, for example, 5021 + ... + 5621.

It is an arithmetic number, because the mean of its divisors is an integer number (425313).

Almost surely, 2^3197921 is an apocalyptic number.

3197921 is the 1265-th centered square number.

It is an amenable number.

3197921 is a deficient number, since it is larger than the sum of its proper divisors (204583).

3197921 is a wasteful number, since it uses less digits than its factorization.

3197921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 3402, while the sum is 32.

The square root of 3197921 is about 1788.2731894205. The cubic root of 3197921 is about 147.3293401091.

The spelling of 3197921 in words is "three million, one hundred ninety-seven thousand, nine hundred twenty-one".