2005257 has 8 divisors (see below), whose sum is σ = 2707840. Its totient is φ = 1319760.

The previous prime is 2005249. The next prime is 2005261. The reversal of 2005257 is 7525002.

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

It is not a de Polignac number, because 2005257 - 2³ = 2005249 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3994 + ... + 4467.

It is an arithmetic number, because the mean of its divisors is an integer number (338480).

2^2005257 is an apocalyptic number.

It is an amenable number.

2005257 is a deficient number, since it is larger than the sum of its proper divisors (702583).

2005257 is an equidigital number, since it uses as much as digits as its factorization.

2005257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 2005257 is about 1416.0709727976. The cubic root of 2005257 is about 126.1023984930.

The spelling of 2005257 in words is "two million, five thousand, two hundred fifty-seven".