2113756 has 12 divisors (see below), whose sum is σ = 3712968. Its totient is φ = 1052912.

The previous prime is 2113753. The next prime is 2113757. The reversal of 2113756 is 6573112.

It is a self number, because there is not a number n which added to its sum of digits gives 2113756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113753) 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, 435 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (309414).

2^2113756 is an apocalyptic number.

It is an amenable number.

2113756 is a deficient number, since it is larger than the sum of its proper divisors (1599212).

2113756 is a wasteful number, since it uses less digits than its factorization.

2113756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988 (or 1986 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 2113756 is about 1453.8761983058. The cubic root of 2113756 is about 128.3369216215.

Adding to 2113756 its reverse (6573112), we get a palindrome (8686868).

The spelling of 2113756 in words is "two million, one hundred thirteen thousand, seven hundred fifty-six".