195025129 has 4 divisors (see below), whose sum is σ = 210027076. Its totient is φ = 180023184.

The previous prime is 195025111. The next prime is 195025157. The reversal of 195025129 is 921520591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921520591 = 661 ⋅1394131.

It can be written as a sum of positive squares in 2 ways, for example, as 13395600 + 181629529 = 3660^2 + 13477^2 .

It is a cyclic number.

It is not a de Polignac number, because 195025129 - 2²⁵ = 161470697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195025094 and 195025103.

It is not an unprimeable number, because it can be changed into a prime (195025109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7500954 + ... + 7500979.

It is an arithmetic number, because the mean of its divisors is an integer number (52506769).

Almost surely, 2^195025129 is an apocalyptic number.

It is an amenable number.

195025129 is a deficient number, since it is larger than the sum of its proper divisors (15001947).

195025129 is a wasteful number, since it uses less digits than its factorization.

195025129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15001946.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 195025129 is about 13965.1397773169. The cubic root of 195025129 is about 579.9139081491.

The spelling of 195025129 in words is "one hundred ninety-five million, twenty-five thousand, one hundred twenty-nine".