129681741 has 16 divisors (see below), whose sum is σ = 198720000. Its totient is φ = 73687728.

The previous prime is 129681719. The next prime is 129681749. The reversal of 129681741 is 147186921.

It is not a de Polignac number, because 129681741 - 2⁵ = 129681709 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129681741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129681749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13491 + ... + 21008.

It is an arithmetic number, because the mean of its divisors is an integer number (12420000).

Almost surely, 2^129681741 is an apocalyptic number.

It is an amenable number.

129681741 is a deficient number, since it is larger than the sum of its proper divisors (69038259).

129681741 is a wasteful number, since it uses less digits than its factorization.

129681741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34688.

The product of its digits is 24192, while the sum is 39.

The square root of 129681741 is about 11387.7891181739. The cubic root of 129681741 is about 506.1659703848.

The spelling of 129681741 in words is "one hundred twenty-nine million, six hundred eighty-one thousand, seven hundred forty-one".