2490857 has 4 divisors (see below), whose sum is σ = 2637396. Its totient is φ = 2344320.

The previous prime is 2490847. The next prime is 2490869. The reversal of 2490857 is 7580942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7580942 = 2 ⋅3790471.

It can be written as a sum of positive squares in 2 ways, for example, as 737881 + 1752976 = 859^2 + 1324^2 .

It is a cyclic number.

It is not a de Polignac number, because 2490857 - 2¹² = 2486761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2490847) 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, 73244 + ... + 73277.

It is an arithmetic number, because the mean of its divisors is an integer number (659349).

2^2490857 is an apocalyptic number.

It is an amenable number.

2490857 is a deficient number, since it is larger than the sum of its proper divisors (146539).

2490857 is a wasteful number, since it uses less digits than its factorization.

2490857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146538.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2490857 is about 1578.2449112860. The cubic root of 2490857 is about 135.5552259192. Note that the first 3 decimals are identical.

The spelling of 2490857 in words is "two million, four hundred ninety thousand, eight hundred fifty-seven".