2400557 has 2 divisors, whose sum is σ = 2400558. Its totient is φ = 2400556.

The previous prime is 2400551. The next prime is 2400571. The reversal of 2400557 is 7550042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2399401 + 1156 = 1549^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400557 - 2²⁰ = 1351981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2400551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200278 + 1200279.

It is an arithmetic number, because the mean of its divisors is an integer number (1200279).

2^2400557 is an apocalyptic number.

It is an amenable number.

2400557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2400557 is an equidigital number, since it uses as much as digits as its factorization.

2400557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 2400557 is about 1549.3730990307. The cubic root of 2400557 is about 133.8969468306.

Adding to 2400557 its reverse (7550042), we get a palindrome (9950599).

The spelling of 2400557 in words is "two million, four hundred thousand, five hundred fifty-seven".