2130856 has 32 divisors (see below), whose sum is σ = 4919040. Its totient is φ = 842688.

The previous prime is 2130853. The next prime is 2130857. The reversal of 2130856 is 6580312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2130856.

It is not an unprimeable number, because it can be changed into a prime (2130853) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 736 + ... + 2191.

It is an arithmetic number, because the mean of its divisors is an integer number (153720).

2^2130856 is an apocalyptic number.

2130856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2130856 is an abundant number, since it is smaller than the sum of its proper divisors (2788184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2130856 is a wasteful number, since it uses less digits than its factorization.

2130856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2130856 is about 1459.7451832426. The cubic root of 2130856 is about 128.6820686667.

The spelling of 2130856 in words is "two million, one hundred thirty thousand, eight hundred fifty-six".