129135045 has 16 divisors (see below), whose sum is σ = 222509952. Its totient is φ = 63574080.

The previous prime is 129134989. The next prime is 129135053. The reversal of 129135045 is 540531921.

It is not a de Polignac number, because 129135045 - 2¹⁰ = 129134021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330921 + ... + 331310.

It is an arithmetic number, because the mean of its divisors is an integer number (13906872).

Almost surely, 2^129135045 is an apocalyptic number.

129135045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129135045 is a deficient number, since it is larger than the sum of its proper divisors (93374907).

129135045 is a wasteful number, since it uses less digits than its factorization.

129135045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662252.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 129135045 is about 11363.7601611438. The cubic root of 129135045 is about 505.4536915532.

Adding to 129135045 its reverse (540531921), we get a palindrome (669666966).

The spelling of 129135045 in words is "one hundred twenty-nine million, one hundred thirty-five thousand, forty-five".