129817141 has 4 divisors (see below), whose sum is σ = 131595532. Its totient is φ = 128038752.

The previous prime is 129817133. The next prime is 129817153. The reversal of 129817141 is 141718921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141718921 = 61 ⋅2323261.

It can be written as a sum of positive squares in 2 ways, for example, as 78694641 + 51122500 = 8871^2 + 7150^2 .

It is a cyclic number.

It is not a de Polignac number, because 129817141 - 2³ = 129817133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129817097 and 129817106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129817741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889086 + ... + 889231.

It is an arithmetic number, because the mean of its divisors is an integer number (32898883).

Almost surely, 2^129817141 is an apocalyptic number.

It is an amenable number.

129817141 is a deficient number, since it is larger than the sum of its proper divisors (1778391).

129817141 is an equidigital number, since it uses as much as digits as its factorization.

129817141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778390.

The product of its digits is 4032, while the sum is 34.

The square root of 129817141 is about 11393.7325315280. The cubic root of 129817141 is about 506.3420708222.

The spelling of 129817141 in words is "one hundred twenty-nine million, eight hundred seventeen thousand, one hundred forty-one".