128113541 has 4 divisors (see below), whose sum is σ = 128179692. Its totient is φ = 128047392.

The previous prime is 128113529. The next prime is 128113543. The reversal of 128113541 is 145311821.

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 68128516 + 59985025 = 8254^2 + 7745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128113541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128113541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128113543) 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, 30080 + ... + 34073.

It is an arithmetic number, because the mean of its divisors is an integer number (32044923).

Almost surely, 2^128113541 is an apocalyptic number.

It is an amenable number.

128113541 is a deficient number, since it is larger than the sum of its proper divisors (66151).

128113541 is an equidigital number, since it uses as much as digits as its factorization.

128113541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66150.

The product of its digits is 960, while the sum is 26.

The square root of 128113541 is about 11318.7252374108. The cubic root of 128113541 is about 504.1173891444.

The spelling of 128113541 in words is "one hundred twenty-eight million, one hundred thirteen thousand, five hundred forty-one".