129892541 has 4 divisors (see below), whose sum is σ = 130552092. Its totient is φ = 129232992.

The previous prime is 129892517. The next prime is 129892591. The reversal of 129892541 is 145298921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129163225 + 729316 = 11365^2 + 854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129892541 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 (129892591) 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, 329480 + ... + 329873.

It is an arithmetic number, because the mean of its divisors is an integer number (32638023).

Almost surely, 2^129892541 is an apocalyptic number.

It is an amenable number.

129892541 is a deficient number, since it is larger than the sum of its proper divisors (659551).

129892541 is an equidigital number, since it uses as much as digits as its factorization.

129892541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659550.

The product of its digits is 51840, while the sum is 41.

The square root of 129892541 is about 11397.0408878796. The cubic root of 129892541 is about 506.4400825401.

It can be divided in two parts, 1298 and 92541, that added together give a palindrome (93839).

The spelling of 129892541 in words is "one hundred twenty-nine million, eight hundred ninety-two thousand, five hundred forty-one".