2109972 has 24 divisors (see below), whose sum is σ = 5213376. Its totient is φ = 661888.

The previous prime is 2109959. The next prime is 2109973. The reversal of 2109972 is 2799012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4968 + ... + 5375.

It is an arithmetic number, because the mean of its divisors is an integer number (217224).

2^2109972 is an apocalyptic number.

It is an amenable number.

2109972 is an abundant number, since it is smaller than the sum of its proper divisors (3103404).

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

2109972 is a wasteful number, since it uses less digits than its factorization.

2109972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10367 (or 10365 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 2109972 is about 1452.5742666039. The cubic root of 2109972 is about 128.2602938893.

It can be divided in two parts, 2109 and 972, that added together give a triangular number (3081 = T₇₈).

The spelling of 2109972 in words is "two million, one hundred nine thousand, nine hundred seventy-two".