2121237 has 12 divisors (see below), whose sum is σ = 3163264. Its totient is φ = 1368360.

The previous prime is 2121199. The next prime is 2121239. The reversal of 2121237 is 7321212.

It is not a de Polignac number, because 2121237 - 2⁸ = 2120981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3523 + ... + 4080.

2^2121237 is an apocalyptic number.

It is an amenable number.

2121237 is a deficient number, since it is larger than the sum of its proper divisors (1042027).

2121237 is a wasteful number, since it uses less digits than its factorization.

2121237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640 (or 7637 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 2121237 is about 1456.4467034533. The cubic root of 2121237 is about 128.4881465950.

Adding to 2121237 its reverse (7321212), we get a palindrome (9442449).

The spelling of 2121237 in words is "two million, one hundred twenty-one thousand, two hundred thirty-seven".