2155712 has 28 divisors (see below), whose sum is σ = 4608576. Its totient is φ = 994560.

The previous prime is 2155711. The next prime is 2155717. The reversal of 2155712 is 2175512.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2155711) 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 3 ways as a sum of consecutive naturals, for example, 464 + ... + 2127.

It is an arithmetic number, because the mean of its divisors is an integer number (164592).

2^2155712 is an apocalyptic number.

It is an amenable number.

2155712 is an abundant number, since it is smaller than the sum of its proper divisors (2452864).

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

2155712 is a wasteful number, since it uses less digits than its factorization.

2155712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616 (or 2606 counting only the distinct ones).

The product of its digits is 700, while the sum is 23.

The square root of 2155712 is about 1468.2343137252. The cubic root of 2155712 is about 129.1804856992.

The spelling of 2155712 in words is "two million, one hundred fifty-five thousand, seven hundred twelve".