2957421 has 4 divisors (see below), whose sum is σ = 3943232. Its totient is φ = 1971612.

The previous prime is 2957417. The next prime is 2957429. The reversal of 2957421 is 1247592.

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 not a de Polignac number, because 2957421 - 2² = 2957417 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2957429) 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, 492901 + ... + 492906.

It is an arithmetic number, because the mean of its divisors is an integer number (985808).

2^2957421 is an apocalyptic number.

It is an amenable number.

2957421 is a deficient number, since it is larger than the sum of its proper divisors (985811).

2957421 is an equidigital number, since it uses as much as digits as its factorization.

2957421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985810.

The product of its digits is 5040, while the sum is 30.

The square root of 2957421 is about 1719.7153834283. The cubic root of 2957421 is about 143.5393749671.

The spelling of 2957421 in words is "two million, nine hundred fifty-seven thousand, four hundred twenty-one".