2557481 has 6 divisors (see below), whose sum is σ = 2649582. Its totient is φ = 2468480.

The previous prime is 2557453. The next prime is 2557501. The reversal of 2557481 is 1847552.

It can be written as a sum of positive squares in 3 ways, for example, as 1155625 + 1401856 = 1075^2 + 1184^2 .

It is not a de Polignac number, because 2557481 - 2⁶ = 2557417 is a prime.

It is a super-2 number, since 2×2557481² = 13081418130722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 680 + ... + 2361.

It is an arithmetic number, because the mean of its divisors is an integer number (441597).

2^2557481 is an apocalyptic number.

It is an amenable number.

2557481 is a deficient number, since it is larger than the sum of its proper divisors (92101).

2557481 is an equidigital number, since it uses as much as digits as its factorization.

2557481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099 (or 3070 counting only the distinct ones).

The product of its digits is 11200, while the sum is 32.

The square root of 2557481 is about 1599.2126187596. The cubic root of 2557481 is about 136.7531919529.

The spelling of 2557481 in words is "two million, five hundred fifty-seven thousand, four hundred eighty-one".