128521141 has 8 divisors (see below), whose sum is σ = 147115584. Its totient is φ = 109985280.

The previous prime is 128521117. The next prime is 128521177. The reversal of 128521141 is 141125821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128521141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128521741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9835 + ... + 18808.

It is an arithmetic number, because the mean of its divisors is an integer number (18389448).

Almost surely, 2^128521141 is an apocalyptic number.

It is an amenable number.

128521141 is a deficient number, since it is larger than the sum of its proper divisors (18594443).

128521141 is an equidigital number, since it uses as much as digits as its factorization.

128521141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29291.

The product of its digits is 640, while the sum is 25.

The square root of 128521141 is about 11336.7164999395. The cubic root of 128521141 is about 504.6514485349.

Adding to 128521141 its reverse (141125821), we get a palindrome (269646962).

The spelling of 128521141 in words is "one hundred twenty-eight million, five hundred twenty-one thousand, one hundred forty-one".