129601541 has 4 divisors (see below), whose sum is σ = 130471500. Its totient is φ = 128731584.

The previous prime is 129601531. The next prime is 129601547. The reversal of 129601541 is 145106921.

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 66080641 + 63520900 = 8129^2 + 7970^2 .

It is a cyclic number.

It is not a de Polignac number, because 129601541 - 2⁶ = 129601477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129601547) 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, 434756 + ... + 435053.

It is an arithmetic number, because the mean of its divisors is an integer number (32617875).

Almost surely, 2^129601541 is an apocalyptic number.

It is an amenable number.

129601541 is a deficient number, since it is larger than the sum of its proper divisors (869959).

129601541 is an equidigital number, since it uses as much as digits as its factorization.

129601541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869958.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 129601541 is about 11384.2672579310. The cubic root of 129601541 is about 506.0616049289.

The spelling of 129601541 in words is "one hundred twenty-nine million, six hundred one thousand, five hundred forty-one".