129232541 has 4 divisors (see below), whose sum is σ = 129265500. Its totient is φ = 129199584.

The previous prime is 129232531. The next prime is 129232553. The reversal of 129232541 is 145232921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145232921 = 17 ⋅8543113.

It can be written as a sum of positive squares in 2 ways, for example, as 89226916 + 40005625 = 9446^2 + 6325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129232541 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129232531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9656 + ... + 18753.

It is an arithmetic number, because the mean of its divisors is an integer number (32316375).

Almost surely, 2^129232541 is an apocalyptic number.

It is an amenable number.

129232541 is a deficient number, since it is larger than the sum of its proper divisors (32959).

129232541 is an equidigital number, since it uses as much as digits as its factorization.

129232541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32958.

The product of its digits is 4320, while the sum is 29.

The square root of 129232541 is about 11368.0491290283. The cubic root of 129232541 is about 505.5808641483.

It can be divided in two parts, 1292 and 32541, that added together give a palindrome (33833).

The spelling of 129232541 in words is "one hundred twenty-nine million, two hundred thirty-two thousand, five hundred forty-one".