2123237 has 2 divisors, whose sum is σ = 2123238. Its totient is φ = 2123236.

The previous prime is 2123213. The next prime is 2123239. The reversal of 2123237 is 7323212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1934881 + 188356 = 1391^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123237 - 2¹⁰ = 2122213 is a prime.

Together with 2123239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061618 + 1061619.

It is an arithmetic number, because the mean of its divisors is an integer number (1061619).

2^2123237 is an apocalyptic number.

It is an amenable number.

2123237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123237 is an equidigital number, since it uses as much as digits as its factorization.

2123237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 20.

The square root of 2123237 is about 1457.1331442253. The cubic root of 2123237 is about 128.5285154257.

Adding to 2123237 its reverse (7323212), we get a palindrome (9446449).

The spelling of 2123237 in words is "two million, one hundred twenty-three thousand, two hundred thirty-seven".