129597245 has 8 divisors (see below), whose sum is σ = 158066520. Its totient is φ = 101977920.

The previous prime is 129597211. The next prime is 129597257. The reversal of 129597245 is 542795921.

It can be written as a sum of positive squares in 4 ways, for example, as 1522756 + 128074489 = 1234^2 + 11317^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-129597245 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129597196 and 129597205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212150 + ... + 212759.

It is an arithmetic number, because the mean of its divisors is an integer number (19758315).

Almost surely, 2^129597245 is an apocalyptic number.

It is an amenable number.

129597245 is a deficient number, since it is larger than the sum of its proper divisors (28469275).

129597245 is an equidigital number, since it uses as much as digits as its factorization.

129597245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424975.

The product of its digits is 226800, while the sum is 44.

The square root of 129597245 is about 11384.0785749221. The cubic root of 129597245 is about 506.0560132652.

The spelling of 129597245 in words is "one hundred twenty-nine million, five hundred ninety-seven thousand, two hundred forty-five".