2100972 has 12 divisors (see below), whose sum is σ = 4902296. Its totient is φ = 700320.

The previous prime is 2100953. The next prime is 2100983. The reversal of 2100972 is 2790012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87529 + ... + 87552.

2^2100972 is an apocalyptic number.

It is an amenable number.

2100972 is an abundant number, since it is smaller than the sum of its proper divisors (2801324).

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

2100972 is a wasteful number, since it uses less digits than its factorization.

2100972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175088 (or 175086 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 2100972 is about 1449.4730076824. The cubic root of 2100972 is about 128.0776709583.

Adding to 2100972 its reverse (2790012), we get a palindrome (4890984).

The spelling of 2100972 in words is "two million, one hundred thousand, nine hundred seventy-two".