2557289 has 4 divisors (see below), whose sum is σ = 2922624. Its totient is φ = 2191956.

The previous prime is 2557279. The next prime is 2557297. The reversal of 2557289 is 9827552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2557289 - 2⁴ = 2557273 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2557279) 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, 182657 + ... + 182670.

It is an arithmetic number, because the mean of its divisors is an integer number (730656).

2^2557289 is an apocalyptic number.

It is an amenable number.

2557289 is a deficient number, since it is larger than the sum of its proper divisors (365335).

2557289 is an equidigital number, since it uses as much as digits as its factorization.

2557289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365334.

The product of its digits is 50400, while the sum is 38.

The square root of 2557289 is about 1599.1525880916. The cubic root of 2557289 is about 136.7497696701.

The spelling of 2557289 in words is "two million, five hundred fifty-seven thousand, two hundred eighty-nine".