2957921 has 4 divisors (see below), whose sum is σ = 2967744. Its totient is φ = 2948100.

The previous prime is 2957917. The next prime is 2957947. The reversal of 2957921 is 1297592.

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.

It is a cyclic number.

It is not a de Polignac number, because 2957921 - 2² = 2957917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2957321) 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, 4445 + ... + 5066.

It is an arithmetic number, because the mean of its divisors is an integer number (741936).

2^2957921 is an apocalyptic number.

It is an amenable number.

2957921 is a deficient number, since it is larger than the sum of its proper divisors (9823).

2957921 is an equidigital number, since it uses as much as digits as its factorization.

2957921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822.

The product of its digits is 11340, while the sum is 35.

The square root of 2957921 is about 1719.8607501772. The cubic root of 2957921 is about 143.5474637313.

The spelling of 2957921 in words is "two million, nine hundred fifty-seven thousand, nine hundred twenty-one".