129142554 has 16 divisors (see below), whose sum is σ = 258953760. Its totient is φ = 42936080.

The previous prime is 129142553. The next prime is 129142571. The reversal of 129142554 is 455241921.

It is not an unprimeable number, because it can be changed into a prime (129142553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25332 + ... + 29999.

It is an arithmetic number, because the mean of its divisors is an integer number (16184610).

Almost surely, 2^129142554 is an apocalyptic number.

129142554 is an abundant number, since it is smaller than the sum of its proper divisors (129811206).

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

129142554 is a wasteful number, since it uses less digits than its factorization.

129142554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55725.

The product of its digits is 14400, while the sum is 33.

The square root of 129142554 is about 11364.0905487417. The cubic root of 129142554 is about 505.4634884760.

The spelling of 129142554 in words is "one hundred twenty-nine million, one hundred forty-two thousand, five hundred fifty-four".