2557105 has 8 divisors (see below), whose sum is σ = 3091752. Its totient is φ = 2030208.

The previous prime is 2557099. The next prime is 2557111. The reversal of 2557105 is 5017552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2557099) and next prime (2557111).

It can be written as a sum of positive squares in 4 ways, for example, as 369664 + 2187441 = 608^2 + 1479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2557105 - 2⁷ = 2556977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2557105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182 + ... + 2551.

It is an arithmetic number, because the mean of its divisors is an integer number (386469).

2^2557105 is an apocalyptic number.

It is an amenable number.

2557105 is a deficient number, since it is larger than the sum of its proper divisors (534647).

2557105 is a wasteful number, since it uses less digits than its factorization.

2557105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875.

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

The square root of 2557105 is about 1599.0950565867. The cubic root of 2557105 is about 136.7464898216.

It can be divided in two parts, 2557 and 105, that added together give a palindrome (2662).

The spelling of 2557105 in words is "two million, five hundred fifty-seven thousand, one hundred five".