2129597 has 2 divisors, whose sum is σ = 2129598. Its totient is φ = 2129596.

The previous prime is 2129587. The next prime is 2129599. The reversal of 2129597 is 7959212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1522756 + 606841 = 1234^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129597 - 2¹⁶ = 2064061 is a prime.

Together with 2129599, 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 (2129599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064798 + 1064799.

It is an arithmetic number, because the mean of its divisors is an integer number (1064799).

2^2129597 is an apocalyptic number.

It is an amenable number.

2129597 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129597 is an equidigital number, since it uses as much as digits as its factorization.

2129597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 2129597 is about 1459.3138798764. The cubic root of 2129597 is about 128.6567200677.

The spelling of 2129597 in words is "two million, one hundred twenty-nine thousand, five hundred ninety-seven".