129871443 has 16 divisors (see below), whose sum is σ = 191524256. Its totient is φ = 77760000.

The previous prime is 129871421. The next prime is 129871447. The reversal of 129871443 is 344178921.

It is not a de Polignac number, because 129871443 - 2⁵ = 129871411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129871447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43558 + ... + 46443.

It is an arithmetic number, because the mean of its divisors is an integer number (11970266).

Almost surely, 2^129871443 is an apocalyptic number.

129871443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129871443 is a deficient number, since it is larger than the sum of its proper divisors (61652813).

129871443 is a wasteful number, since it uses less digits than its factorization.

129871443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90054.

The product of its digits is 48384, while the sum is 39.

The square root of 129871443 is about 11396.1152591574. The cubic root of 129871443 is about 506.4126612801.

It can be divided in two parts, 12987 and 1443, that multiplied together give a square (18740241 = 4329²).

The spelling of 129871443 in words is "one hundred twenty-nine million, eight hundred seventy-one thousand, four hundred forty-three".