2185256 has 8 divisors (see below), whose sum is σ = 4097370. Its totient is φ = 1092624.

The previous prime is 2185241. The next prime is 2185279. The reversal of 2185256 is 6525812.

It can be written as a sum of positive squares in only one way, i.e., 2149156 + 36100 = 1466^2 + 190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136571 + ... + 136586.

2^2185256 is an apocalyptic number.

It is an amenable number.

2185256 is a deficient number, since it is larger than the sum of its proper divisors (1912114).

2185256 is a wasteful number, since it uses less digits than its factorization.

2185256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273163 (or 273159 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2185256 is about 1478.2611406649. The cubic root of 2185256 is about 129.7679489526.

The spelling of 2185256 in words is "two million, one hundred eighty-five thousand, two hundred fifty-six".