129549850 has 12 divisors (see below), whose sum is σ = 240962814. Its totient is φ = 51819920.

The previous prime is 129549829. The next prime is 129549851. The reversal of 129549850 is 58945921.

It can be written as a sum of positive squares in 3 ways, for example, as 125821089 + 3728761 = 11217^2 + 1931^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129549797 and 129549806.

It is not an unprimeable number, because it can be changed into a prime (129549851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1295449 + ... + 1295548.

Almost surely, 2^129549850 is an apocalyptic number.

129549850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129549850 is a deficient number, since it is larger than the sum of its proper divisors (111412964).

129549850 is a wasteful number, since it uses less digits than its factorization.

129549850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591009 (or 2591004 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 129549850 is about 11381.9967492527. The cubic root of 129549850 is about 505.9943158396.

The spelling of 129549850 in words is "one hundred twenty-nine million, five hundred forty-nine thousand, eight hundred fifty".