2508557 has 2 divisors, whose sum is σ = 2508558. Its totient is φ = 2508556.

The previous prime is 2508521. The next prime is 2508559. The reversal of 2508557 is 7558052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1623076 + 885481 = 1274^2 + 941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2508557 is a prime.

Together with 2508559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2508559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1254278 + 1254279.

It is an arithmetic number, because the mean of its divisors is an integer number (1254279).

2^2508557 is an apocalyptic number.

It is an amenable number.

2508557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2508557 is an equidigital number, since it uses as much as digits as its factorization.

2508557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 2508557 is about 1583.8424795414. The cubic root of 2508557 is about 135.8755529701.

It can be divided in two parts, 2508 and 557, that multiplied together give a triangular number (1396956 = T₁₆₇₁).

The spelling of 2508557 in words is "two million, five hundred eight thousand, five hundred fifty-seven".