2154169 has 2 divisors, whose sum is σ = 2154170. Its totient is φ = 2154168.

The previous prime is 2154161. The next prime is 2154193. The reversal of 2154169 is 9614512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1923769 + 230400 = 1387^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154169 - 2³ = 2154161 is a prime.

It is a super-2 number, since 2×2154169² = 9280888161122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2154161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077084 + 1077085.

It is an arithmetic number, because the mean of its divisors is an integer number (1077085).

2^2154169 is an apocalyptic number.

It is an amenable number.

2154169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154169 is an equidigital number, since it uses as much as digits as its factorization.

2154169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 2154169 is about 1467.7087585758. The cubic root of 2154169 is about 129.1496570502.

The spelling of 2154169 in words is "two million, one hundred fifty-four thousand, one hundred sixty-nine".