129192745 has 8 divisors (see below), whose sum is σ = 169125120. Its totient is φ = 93958320.

The previous prime is 129192743. The next prime is 129192751. The reversal of 129192745 is 547291921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129192745 - 2¹ = 129192743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129192698 and 129192707.

It is not an unprimeable number, because it can be changed into a prime (129192743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174425 + ... + 1174534.

It is an arithmetic number, because the mean of its divisors is an integer number (21140640).

Almost surely, 2^129192745 is an apocalyptic number.

It is an amenable number.

129192745 is a deficient number, since it is larger than the sum of its proper divisors (39932375).

129192745 is a wasteful number, since it uses less digits than its factorization.

129192745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348975.

The product of its digits is 45360, while the sum is 40.

The square root of 129192745 is about 11366.2986499564. The cubic root of 129192745 is about 505.5289624587.

The spelling of 129192745 in words is "one hundred twenty-nine million, one hundred ninety-two thousand, seven hundred forty-five".