129322441 has 4 divisors (see below), whose sum is σ = 129345300. Its totient is φ = 129299584.

The previous prime is 129322439. The next prime is 129322481. The reversal of 129322441 is 144223921.

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: 144223921 = 8209 ⋅17569.

It can be written as a sum of positive squares in 2 ways, for example, as 123543225 + 5779216 = 11115^2 + 2404^2 .

It is a cyclic number.

It is not a de Polignac number, because 129322441 - 2¹ = 129322439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129322411) 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, 4005 + ... + 16573.

It is an arithmetic number, because the mean of its divisors is an integer number (32336325).

Almost surely, 2^129322441 is an apocalyptic number.

It is an amenable number.

129322441 is a deficient number, since it is larger than the sum of its proper divisors (22859).

129322441 is a wasteful number, since it uses less digits than its factorization.

129322441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22858.

The product of its digits is 3456, while the sum is 28.

The square root of 129322441 is about 11372.0025061552. The cubic root of 129322441 is about 505.6980719454.

The spelling of 129322441 in words is "one hundred twenty-nine million, three hundred twenty-two thousand, four hundred forty-one".