2920257 has 6 divisors (see below), whose sum is σ = 4218162. Its totient is φ = 1946832.

The previous prime is 2920249. The next prime is 2920273. The reversal of 2920257 is 7520292.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2903616 + 16641 = 1704^2 + 129^2 .

It is not a de Polignac number, because 2920257 - 2³ = 2920249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2920257.

It is not an unprimeable number, because it can be changed into a prime (2920207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162228 + ... + 162245.

It is an arithmetic number, because the mean of its divisors is an integer number (703027).

2^2920257 is an apocalyptic number.

It is an amenable number.

2920257 is a deficient number, since it is larger than the sum of its proper divisors (1297905).

2920257 is a wasteful number, since it uses less digits than its factorization.

2920257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324479 (or 324476 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2920257 is about 1708.8759463460. The cubic root of 2920257 is about 142.9355831600.

The spelling of 2920257 in words is "two million, nine hundred twenty thousand, two hundred fifty-seven".