129454780 has 48 divisors (see below), whose sum is σ = 334595520. Its totient is φ = 40969728.

The previous prime is 129454777. The next prime is 129454781. The reversal of 129454780 is 87454921.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129454781) 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 15 ways as a sum of consecutive naturals, for example, 33745 + ... + 37384.

It is an arithmetic number, because the mean of its divisors is an integer number (6970740).

Almost surely, 2^129454780 is an apocalyptic number.

129454780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129454780 is an abundant number, since it is smaller than the sum of its proper divisors (205140740).

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

129454780 is a wasteful number, since it uses less digits than its factorization.

129454780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71158 (or 71156 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 129454780 is about 11377.8196505306. The cubic root of 129454780 is about 505.8705111121.

The spelling of 129454780 in words is "one hundred twenty-nine million, four hundred fifty-four thousand, seven hundred eighty".