129147850 has 24 divisors (see below), whose sum is σ = 258694380. Its totient is φ = 47685120.

The previous prime is 129147847. The next prime is 129147853. The reversal of 129147850 is 58741921.

It is an interprime number because it is at equal distance from previous prime (129147847) and next prime (129147853).

It can be written as a sum of positive squares in 6 ways, for example, as 10621081 + 118526769 = 3259^2 + 10887^2 .

It is not an unprimeable number, because it can be changed into a prime (129147853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98695 + ... + 99994.

Almost surely, 2^129147850 is an apocalyptic number.

129147850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129147850 is an abundant number, since it is smaller than the sum of its proper divisors (129546530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129147850 is a wasteful number, since it uses less digits than its factorization.

129147850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198714 (or 198709 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 129147850 is about 11364.3235610396. The cubic root of 129147850 is about 505.4703978898.

It can be divided in two parts, 1291 and 47850, that added together give a triangular number (49141 = T₃₁₃).

The spelling of 129147850 in words is "one hundred twenty-nine million, one hundred forty-seven thousand, eight hundred fifty".