2501557 has 4 divisors (see below), whose sum is σ = 2505580. Its totient is φ = 2497536.

The previous prime is 2501507. The next prime is 2501563. The reversal of 2501557 is 7551052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1962801 + 538756 = 1401^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501557 - 2¹¹ = 2499509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501507) 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, 858 + ... + 2395.

It is an arithmetic number, because the mean of its divisors is an integer number (626395).

2^2501557 is an apocalyptic number.

It is an amenable number.

2501557 is a deficient number, since it is larger than the sum of its proper divisors (4023).

2501557 is an equidigital number, since it uses as much as digits as its factorization.

2501557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 2501557 is about 1581.6311200783. The cubic root of 2501557 is about 135.7490506374.

The spelling of 2501557 in words is "two million, five hundred one thousand, five hundred fifty-seven".