2557825 has 12 divisors (see below), whose sum is σ = 3206268. Its totient is φ = 2024000.

The previous prime is 2557823. The next prime is 2557843. The reversal of 2557825 is 5287552.

It can be written as a sum of positive squares in 6 ways, for example, as 121104 + 2436721 = 348^2 + 1561^2 .

It is not a de Polignac number, because 2557825 - 2¹ = 2557823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2019 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (267189).

2^2557825 is an apocalyptic number.

2557825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2557825 is a deficient number, since it is larger than the sum of its proper divisors (648443).

2557825 is a wasteful number, since it uses less digits than its factorization.

2557825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1119 counting only the distinct ones).

The product of its digits is 28000, while the sum is 34.

The square root of 2557825 is about 1599.3201680714. The cubic root of 2557825 is about 136.7593231147.

The spelling of 2557825 in words is "two million, five hundred fifty-seven thousand, eight hundred twenty-five".