3197021 has 4 divisors (see below), whose sum is σ = 3200700. Its totient is φ = 3193344.

The previous prime is 3197011. The next prime is 3197027. The reversal of 3197021 is 1207913.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 81796 + 3115225 = 286^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 3197021 - 2⁶ = 3196957 is a prime.

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 (3197027) 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, 275 + ... + 2543.

It is an arithmetic number, because the mean of its divisors is an integer number (800175).

Almost surely, 2^3197021 is an apocalyptic number.

It is an amenable number.

3197021 is a deficient number, since it is larger than the sum of its proper divisors (3679).

3197021 is a wasteful number, since it uses less digits than its factorization.

3197021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 3197021 is about 1788.0215323088. The cubic root of 3197021 is about 147.3155177073.

The spelling of 3197021 in words is "three million, one hundred ninety-seven thousand, twenty-one".