2440657 has 2 divisors, whose sum is σ = 2440658. Its totient is φ = 2440656.

The previous prime is 2440649. The next prime is 2440667. The reversal of 2440657 is 7560442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2099601 + 341056 = 1449^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 2440657 - 2³ = 2440649 is a prime.

2440657 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2440667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220328 + 1220329.

It is an arithmetic number, because the mean of its divisors is an integer number (1220329).

2^2440657 is an apocalyptic number.

It is an amenable number.

2440657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440657 is an equidigital number, since it uses as much as digits as its factorization.

2440657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 2440657 is about 1562.2602216020. The cubic root of 2440657 is about 134.6383921240.

The spelling of 2440657 in words is "two million, four hundred forty thousand, six hundred fifty-seven".