129161041 has 8 divisors (see below), whose sum is σ = 133796520. Its totient is φ = 124537728.

The previous prime is 129161033. The next prime is 129161051. The reversal of 129161041 is 140161921.

It can be written as a sum of positive squares in 4 ways, for example, as 45968400 + 83192641 = 6780^2 + 9121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129161041 - 2³ = 129161033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129160997 and 129161015.

It is not an unprimeable number, because it can be changed into a prime (129161051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22255 + ... + 27451.

It is an arithmetic number, because the mean of its divisors is an integer number (16724565).

Almost surely, 2^129161041 is an apocalyptic number.

It is an amenable number.

129161041 is a deficient number, since it is larger than the sum of its proper divisors (4635479).

129161041 is an equidigital number, since it uses as much as digits as its factorization.

129161041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6083.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 129161041 is about 11364.9039151240. The cubic root of 129161041 is about 505.4876066755.

The spelling of 129161041 in words is "one hundred twenty-nine million, one hundred sixty-one thousand, forty-one".