128131306 has 8 divisors (see below), whose sum is σ = 196286400. Its totient is φ = 62702508.

The previous prime is 128131291. The next prime is 128131313. The reversal of 128131306 is 603131821.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 681456 + ... + 681643.

It is an arithmetic number, because the mean of its divisors is an integer number (24535800).

Almost surely, 2^128131306 is an apocalyptic number.

128131306 is a deficient number, since it is larger than the sum of its proper divisors (68155094).

128131306 is a wasteful number, since it uses less digits than its factorization.

128131306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363148.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 128131306 is about 11319.5099717258. The cubic root of 128131306 is about 504.1406893915.

It can be divided in two parts, 12 and 8131306, that added together give a palindrome (8131318).

The spelling of 128131306 in words is "one hundred twenty-eight million, one hundred thirty-one thousand, three hundred six".