2557109 has 4 divisors (see below), whose sum is σ = 2569440. Its totient is φ = 2544780.

The previous prime is 2557099. The next prime is 2557111. The reversal of 2557109 is 9017552.

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 a de Polignac number, because none of the positive numbers 2^k-2557109 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557169) 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, 5849 + ... + 6270.

It is an arithmetic number, because the mean of its divisors is an integer number (642360).

2^2557109 is an apocalyptic number.

It is an amenable number.

2557109 is a deficient number, since it is larger than the sum of its proper divisors (12331).

2557109 is a wasteful number, since it uses less digits than its factorization.

2557109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12330.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 2557109 is about 1599.0963072936. The cubic root of 2557109 is about 136.7465611244.

The spelling of 2557109 in words is "two million, five hundred fifty-seven thousand, one hundred nine".