129812041 has 4 divisors (see below), whose sum is σ = 129834900. Its totient is φ = 129789184.

The previous prime is 129812003. The next prime is 129812057. The reversal of 129812041 is 140218921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 140218921 = 31 ⋅4523191.

It can be written as a sum of positive squares in 2 ways, for example, as 38800441 + 91011600 = 6229^2 + 9540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129812041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129812341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4365 + ... + 16693.

It is an arithmetic number, because the mean of its divisors is an integer number (32458725).

Almost surely, 2^129812041 is an apocalyptic number.

It is an amenable number.

129812041 is a deficient number, since it is larger than the sum of its proper divisors (22859).

129812041 is a wasteful number, since it uses less digits than its factorization.

129812041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22858.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 129812041 is about 11393.5087220750. The cubic root of 129812041 is about 506.3354400122.

The spelling of 129812041 in words is "one hundred twenty-nine million, eight hundred twelve thousand, forty-one".