128835541 has 4 divisors (see below), whose sum is σ = 128895372. Its totient is φ = 128775712.

The previous prime is 128835533. The next prime is 128835557. The reversal of 128835541 is 145538821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145538821 = 317 ⋅459113.

It can be written as a sum of positive squares in 2 ways, for example, as 62884900 + 65950641 = 7930^2 + 8121^2 .

It is a cyclic number.

It is not a de Polignac number, because 128835541 - 2³ = 128835533 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 128835541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128835521) 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, 26560 + ... + 31033.

It is an arithmetic number, because the mean of its divisors is an integer number (32223843).

Almost surely, 2^128835541 is an apocalyptic number.

It is an amenable number.

128835541 is a deficient number, since it is larger than the sum of its proper divisors (59831).

128835541 is an equidigital number, since it uses as much as digits as its factorization.

128835541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59830.

The product of its digits is 38400, while the sum is 37.

The square root of 128835541 is about 11350.5744788535. The cubic root of 128835541 is about 505.0626213885.

The spelling of 128835541 in words is "one hundred twenty-eight million, eight hundred thirty-five thousand, five hundred forty-one".