4957021 has 2 divisors, whose sum is σ = 4957022. Its totient is φ = 4957020.

The previous prime is 4957019. The next prime is 4957031. The reversal of 4957021 is 1207594.

It is a happy number.

4957021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4901796 + 55225 = 2214^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 4957021 - 2¹ = 4957019 is a prime.

Together with 4957019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4957031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2478510 + 2478511.

It is an arithmetic number, because the mean of its divisors is an integer number (2478511).

Almost surely, 2^4957021 is an apocalyptic number.

It is an amenable number.

4957021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4957021 is an equidigital number, since it uses as much as digits as its factorization.

4957021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 4957021 is about 2226.4368394365. The cubic root of 4957021 is about 170.5062303689.

The spelling of 4957021 in words is "four million, nine hundred fifty-seven thousand, twenty-one".