129201954 has 16 divisors (see below), whose sum is σ = 295318848. Its totient is φ = 36914832.

The previous prime is 129201913. The next prime is 129201959. The reversal of 129201954 is 459102921.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129201959) 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, 1538077 + ... + 1538160.

It is an arithmetic number, because the mean of its divisors is an integer number (18457428).

Almost surely, 2^129201954 is an apocalyptic number.

129201954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129201954 is an abundant number, since it is smaller than the sum of its proper divisors (166116894).

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

129201954 is a wasteful number, since it uses less digits than its factorization.

129201954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076249.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 129201954 is about 11366.7037438300. The cubic root of 129201954 is about 505.5409737255.

The spelling of 129201954 in words is "one hundred twenty-nine million, two hundred one thousand, nine hundred fifty-four".