2121937 has 4 divisors (see below), whose sum is σ = 2132800. Its totient is φ = 2111076.

The previous prime is 2121907. The next prime is 2121941. The reversal of 2121937 is 7391212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121937 - 2⁷ = 2121809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121907) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5133 + ... + 5530.

It is an arithmetic number, because the mean of its divisors is an integer number (533200).

2^2121937 is an apocalyptic number.

It is an amenable number.

2121937 is a deficient number, since it is larger than the sum of its proper divisors (10863).

2121937 is a wasteful number, since it uses less digits than its factorization.

2121937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10862.

The product of its digits is 756, while the sum is 25.

The square root of 2121937 is about 1456.6869945187. The cubic root of 2121937 is about 128.5022785709.

The spelling of 2121937 in words is "two million, one hundred twenty-one thousand, nine hundred thirty-seven".