2497657 has 4 divisors (see below), whose sum is σ = 2644596. Its totient is φ = 2350720.

The previous prime is 2497637. The next prime is 2497661. The reversal of 2497657 is 7567942.

2497657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7567942 = 2 ⋅3783971.

It can be written as a sum of positive squares in 2 ways, for example, as 1142761 + 1354896 = 1069^2 + 1164^2 .

It is a cyclic number.

It is not a de Polignac number, because 2497657 - 2¹⁹ = 1973369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2497637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73444 + ... + 73477.

It is an arithmetic number, because the mean of its divisors is an integer number (661149).

2^2497657 is an apocalyptic number.

It is an amenable number.

2497657 is a deficient number, since it is larger than the sum of its proper divisors (146939).

2497657 is a wasteful number, since it uses less digits than its factorization.

2497657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146938.

The product of its digits is 105840, while the sum is 40.

The square root of 2497657 is about 1580.3977347491. The cubic root of 2497657 is about 135.6784683742.

The spelling of 2497657 in words is "two million, four hundred ninety-seven thousand, six hundred fifty-seven".