129645054 has 96 divisors (see below), whose sum is σ = 354481920. Its totient is φ = 33264000.

The previous prime is 129645053. The next prime is 129645073. The reversal of 129645054 is 450546921.

129645054 is a `hidden beast` number, since 1 + 2 + 9 + 645 + 0 + 5 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129645053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122829 + ... + 123879.

It is an arithmetic number, because the mean of its divisors is an integer number (3692520).

Almost surely, 2^129645054 is an apocalyptic number.

129645054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129645054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177240960).

129645054 is an abundant number, since it is smaller than the sum of its proper divisors (224836866).

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

129645054 is a wasteful number, since it uses less digits than its factorization.

129645054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 129645054 is about 11386.1781999054. The cubic root of 129645054 is about 506.1182343859.

The spelling of 129645054 in words is "one hundred twenty-nine million, six hundred forty-five thousand, fifty-four".