2120931 has 8 divisors (see below), whose sum is σ = 3142160. Its totient is φ = 1413936.

The previous prime is 2120917. The next prime is 2120933. The reversal of 2120931 is 1390212.

It is a happy number.

It is not a de Polignac number, because 2120931 - 2¹⁰ = 2119907 is a prime.

It is a super-2 number, since 2×2120931² = 8996696613522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120933) 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, 39250 + ... + 39303.

It is an arithmetic number, because the mean of its divisors is an integer number (392770).

2^2120931 is an apocalyptic number.

2120931 is a deficient number, since it is larger than the sum of its proper divisors (1021229).

2120931 is an equidigital number, since it uses as much as digits as its factorization.

2120931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78562 (or 78556 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2120931 is about 1456.3416494765. The cubic root of 2120931 is about 128.4819679260.

The spelling of 2120931 in words is "two million, one hundred twenty thousand, nine hundred thirty-one".