2185258 has 4 divisors (see below), whose sum is σ = 3277890. Its totient is φ = 1092628.

The previous prime is 2185241. The next prime is 2185279. The reversal of 2185258 is 8525812.

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

It can be written as a sum of positive squares in only one way, i.e., 2053489 + 131769 = 1433^2 + 363^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546313 + ... + 546316.

2^2185258 is an apocalyptic number.

2185258 is a deficient number, since it is larger than the sum of its proper divisors (1092632).

2185258 is a wasteful number, since it uses less digits than its factorization.

2185258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092631.

The product of its digits is 6400, while the sum is 31.

The square root of 2185258 is about 1478.2618171352. The cubic root of 2185258 is about 129.7679885415.

It can be divided in two parts, 218 and 5258, that added together give a square (5476 = 74²).

The spelling of 2185258 in words is "two million, one hundred eighty-five thousand, two hundred fifty-eight".