2125405169 has 2 divisors, whose sum is σ = 2125405170. Its totient is φ = 2125405168.

The previous prime is 2125405141. The next prime is 2125405187. The reversal of 2125405169 is 9615045212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1161923569 + 963481600 = 34087^2 + 31040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125405169 - 2²⁰ = 2124356593 is a prime.

It is a super-2 number, since 2×2125405169² = 9034694264823837122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2125405199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062702584 + 1062702585.

It is an arithmetic number, because the mean of its divisors is an integer number (1062702585).

Almost surely, 2^2125405169 is an apocalyptic number.

It is an amenable number.

2125405169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125405169 is an equidigital number, since it uses as much as digits as its factorization.

2125405169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 2125405169 is about 46102.1167518369. The cubic root of 2125405169 is about 1285.7225002221.

The spelling of 2125405169 in words is "two billion, one hundred twenty-five million, four hundred five thousand, one hundred sixty-nine".