128262539 has 8 divisors (see below), whose sum is σ = 129160512. Its totient is φ = 127368000.

The previous prime is 128262529. The next prime is 128262557. The reversal of 128262539 is 935262821.

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

It is a cyclic number.

It is not a de Polignac number, because 128262539 - 2⁴ = 128262523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128262509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170414 + ... + 171164.

It is an arithmetic number, because the mean of its divisors is an integer number (16145064).

Almost surely, 2^128262539 is an apocalyptic number.

128262539 is a deficient number, since it is larger than the sum of its proper divisors (897973).

128262539 is an equidigital number, since it uses as much as digits as its factorization.

128262539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717.

The product of its digits is 51840, while the sum is 38.

The square root of 128262539 is about 11325.3052497493. The cubic root of 128262539 is about 504.3127454978.

The spelling of 128262539 in words is "one hundred twenty-eight million, two hundred sixty-two thousand, five hundred thirty-nine".