2120872 has 16 divisors (see below), whose sum is σ = 4282740. Its totient is φ = 978816.

The previous prime is 2120863. The next prime is 2120879. The reversal of 2120872 is 2780212.

2120872 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 64516 = 1434^2 + 254^2 .

It is not an unprimeable number, because it can be changed into a prime (2120879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10093 + ... + 10300.

2^2120872 is an apocalyptic number.

It is an amenable number.

2120872 is an abundant number, since it is smaller than the sum of its proper divisors (2161868).

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

2120872 is a wasteful number, since it uses less digits than its factorization.

2120872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20412 (or 20408 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 2120872 is about 1456.3213930998. The cubic root of 2120872 is about 128.4807765457.

It can be divided in two parts, 2120 and 872, that added together give a palindrome (2992).

The spelling of 2120872 in words is "two million, one hundred twenty thousand, eight hundred seventy-two".