129041385 has 64 divisors (see below), whose sum is σ = 241643520. Its totient is φ = 58164480.

The previous prime is 129041383. The next prime is 129041389. The reversal of 129041385 is 583140921.

It is not a de Polignac number, because 129041385 - 2¹ = 129041383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (129041383) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139956 + ... + 140874.

It is an arithmetic number, because the mean of its divisors is an integer number (3775680).

Almost surely, 2^129041385 is an apocalyptic number.

129041385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129041385 is a deficient number, since it is larger than the sum of its proper divisors (112602135).

129041385 is a wasteful number, since it uses less digits than its factorization.

129041385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 129041385 is about 11359.6384185413. The cubic root of 129041385 is about 505.3314622941.

The spelling of 129041385 in words is "one hundred twenty-nine million, forty-one thousand, three hundred eighty-five".