2102656 has 16 divisors (see below), whose sum is σ = 4189140. Its totient is φ = 1051264.

The previous prime is 2102651. The next prime is 2102687. The reversal of 2102656 is 6562012.

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8086 + ... + 8341.

2^2102656 is an apocalyptic number.

It is an amenable number.

2102656 is a deficient number, since it is larger than the sum of its proper divisors (2086484).

2102656 is an equidigital number, since it uses as much as digits as its factorization.

2102656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16441 (or 16429 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2102656 is about 1450.0537921057. The cubic root of 2102656 is about 128.1118813457. Note that the first 3 decimals are identical.

Adding to 2102656 its reverse (6562012), we get a palindrome (8664668).

The spelling of 2102656 in words is "two million, one hundred two thousand, six hundred fifty-six".