2642657 has 4 divisors (see below), whose sum is σ = 2727936. Its totient is φ = 2557380.

The previous prime is 2642639. The next prime is 2642693. The reversal of 2642657 is 7562462.

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 a cyclic number.

It is not a de Polignac number, because 2642657 - 2¹⁰ = 2641633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2642257) 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, 42593 + ... + 42654.

It is an arithmetic number, because the mean of its divisors is an integer number (681984).

2^2642657 is an apocalyptic number.

It is an amenable number.

2642657 is a deficient number, since it is larger than the sum of its proper divisors (85279).

2642657 is an equidigital number, since it uses as much as digits as its factorization.

2642657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85278.

The product of its digits is 20160, while the sum is 32.

The square root of 2642657 is about 1625.6251105344. The cubic root of 2642657 is about 138.2548152018.

The spelling of 2642657 in words is "two million, six hundred forty-two thousand, six hundred fifty-seven".