2142756 has 72 divisors (see below), whose sum is σ = 6761664. Its totient is φ = 555840.

The previous prime is 2142743. The next prime is 2142761. The reversal of 2142756 is 6572412.

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 in 23 ways as a sum of consecutive naturals, for example, 2386 + ... + 3158.

It is an arithmetic number, because the mean of its divisors is an integer number (93912).

2^2142756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2142756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3380832).

2142756 is an abundant number, since it is smaller than the sum of its proper divisors (4618908).

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

2142756 is a wasteful number, since it uses less digits than its factorization.

2142756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 796 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 2142756 is about 1463.8155621526. The cubic root of 2142756 is about 128.9211705154.

The spelling of 2142756 in words is "two million, one hundred forty-two thousand, seven hundred fifty-six".