129194845 has 16 divisors (see below), whose sum is σ = 168077952. Its totient is φ = 94766400.

The previous prime is 129194839. The next prime is 129194881. The reversal of 129194845 is 548491921.

It is not a de Polignac number, because 129194845 - 2¹⁷ = 129063773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3234 + ... + 16396.

It is an arithmetic number, because the mean of its divisors is an integer number (10504872).

Almost surely, 2^129194845 is an apocalyptic number.

It is an amenable number.

129194845 is a deficient number, since it is larger than the sum of its proper divisors (38883107).

129194845 is a wasteful number, since it uses less digits than its factorization.

129194845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13332.

The product of its digits is 103680, while the sum is 43.

The square root of 129194845 is about 11366.3910279385. The cubic root of 129194845 is about 505.5317015316.

The spelling of 129194845 in words is "one hundred twenty-nine million, one hundred ninety-four thousand, eight hundred forty-five".