2173256 has 8 divisors (see below), whose sum is σ = 4074870. Its totient is φ = 1086624.

The previous prime is 2173243. The next prime is 2173307. The reversal of 2173256 is 6523712.

It can be written as a sum of positive squares in only one way, i.e., 2102500 + 70756 = 1450^2 + 266^2 .

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

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, 135821 + ... + 135836.

2^2173256 is an apocalyptic number.

It is an amenable number.

2173256 is a deficient number, since it is larger than the sum of its proper divisors (1901614).

2173256 is a wasteful number, since it uses less digits than its factorization.

2173256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271663 (or 271659 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 2173256 is about 1474.1967304264. The cubic root of 2173256 is about 129.5299791955.

Adding to 2173256 its reverse (6523712), we get a palindrome (8696968).

The spelling of 2173256 in words is "two million, one hundred seventy-three thousand, two hundred fifty-six".