2169157 has 2 divisors, whose sum is σ = 2169158. Its totient is φ = 2169156.

The previous prime is 2169151. The next prime is 2169161. The reversal of 2169157 is 7519612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1758276 + 410881 = 1326^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 2169157 - 2⁷ = 2169029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2169151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084578 + 1084579.

It is an arithmetic number, because the mean of its divisors is an integer number (1084579).

2^2169157 is an apocalyptic number.

It is an amenable number.

2169157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169157 is an equidigital number, since it uses as much as digits as its factorization.

2169157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 31.

The square root of 2169157 is about 1472.8058256267. The cubic root of 2169157 is about 129.4484920105.

The spelling of 2169157 in words is "two million, one hundred sixty-nine thousand, one hundred fifty-seven".