129922750 has 16 divisors (see below), whose sum is σ = 243215856. Its totient is φ = 51969000.

The previous prime is 129922747. The next prime is 129922757. The reversal of 129922750 is 57229921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129922757) 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, 259596 + ... + 260095.

It is an arithmetic number, because the mean of its divisors is an integer number (15200991).

Almost surely, 2^129922750 is an apocalyptic number.

129922750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129922750 is a deficient number, since it is larger than the sum of its proper divisors (113293106).

129922750 is an equidigital number, since it uses as much as digits as its factorization.

129922750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519708 (or 519698 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 129922750 is about 11398.3661109827. The cubic root of 129922750 is about 506.4793402795.

The spelling of 129922750 in words is "one hundred twenty-nine million, nine hundred twenty-two thousand, seven hundred fifty".