129861466 has 48 divisors (see below), whose sum is σ = 241315200. Its totient is φ = 52109568.

The previous prime is 129861443. The next prime is 129861467. The reversal of 129861466 is 664168921.

It is not an unprimeable number, because it can be changed into a prime (129861467) 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 23 ways as a sum of consecutive naturals, for example, 180255 + ... + 180973.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^129861466 is an apocalyptic number.

129861466 is a deficient number, since it is larger than the sum of its proper divisors (111453734).

129861466 is a wasteful number, since it uses less digits than its factorization.

129861466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 844 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 129861466 is about 11395.6775138646. The cubic root of 129861466 is about 506.3996930494.

The spelling of 129861466 in words is "one hundred twenty-nine million, eight hundred sixty-one thousand, four hundred sixty-six".