2185257 has 8 divisors (see below), whose sum is σ = 2992576. Its totient is φ = 1417392.

The previous prime is 2185241. The next prime is 2185279. The reversal of 2185257 is 7525812.

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

It is not a de Polignac number, because 2185257 - 2⁴ = 2185241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2185297) 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, 9733 + ... + 9954.

It is an arithmetic number, because the mean of its divisors is an integer number (374072).

2^2185257 is an apocalyptic number.

It is an amenable number.

2185257 is a deficient number, since it is larger than the sum of its proper divisors (807319).

2185257 is a wasteful number, since it uses less digits than its factorization.

2185257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19727.

The product of its digits is 5600, while the sum is 30.

The square root of 2185257 is about 1478.2614789001. The cubic root of 2185257 is about 129.7679687471.

It can be divided in two parts, 2185 and 257, that added together give a palindrome (2442).

The spelling of 2185257 in words is "two million, one hundred eighty-five thousand, two hundred fifty-seven".