2557207 has 4 divisors (see below), whose sum is σ = 2593296. Its totient is φ = 2521120.

The previous prime is 2557201. The next prime is 2557213. The reversal of 2557207 is 7027552.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2557201) and next prime (2557213).

It is a cyclic number.

It is not a de Polignac number, because 2557207 - 2³ = 2557199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557201) 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, 17938 + ... + 18079.

It is an arithmetic number, because the mean of its divisors is an integer number (648324).

2^2557207 is an apocalyptic number.

2557207 is a deficient number, since it is larger than the sum of its proper divisors (36089).

2557207 is an equidigital number, since it uses as much as digits as its factorization.

2557207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36088.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 2557207 is about 1599.1269493070. The cubic root of 2557207 is about 136.7483080179.

The spelling of 2557207 in words is "two million, five hundred fifty-seven thousand, two hundred seven".