129699245 has 32 divisors (see below), whose sum is σ = 173644800. Its totient is φ = 92378880.

The previous prime is 129699233. The next prime is 129699247. The reversal of 129699245 is 542996921.

It is a happy number.

It is not a de Polignac number, because 129699245 - 2¹⁶ = 129633709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129699245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129699247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 478460 + ... + 478730.

It is an arithmetic number, because the mean of its divisors is an integer number (5426400).

Almost surely, 2^129699245 is an apocalyptic number.

It is an amenable number.

129699245 is a deficient number, since it is larger than the sum of its proper divisors (43945555).

129699245 is a wasteful number, since it uses less digits than its factorization.

129699245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525.

The product of its digits is 349920, while the sum is 47.

The square root of 129699245 is about 11388.5576347490. The cubic root of 129699245 is about 506.1887428802.

The spelling of 129699245 in words is "one hundred twenty-nine million, six hundred ninety-nine thousand, two hundred forty-five".