128431127 has 8 divisors (see below), whose sum is σ = 147480960. Its totient is φ = 110610360.

The previous prime is 128431117. The next prime is 128431139. The reversal of 128431127 is 721134821.

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 128431127 - 2¹² = 128427031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128431127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128431117) 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, 307043 + ... + 307460.

It is an arithmetic number, because the mean of its divisors is an integer number (18435120).

Almost surely, 2^128431127 is an apocalyptic number.

128431127 is a deficient number, since it is larger than the sum of its proper divisors (19049833).

128431127 is a wasteful number, since it uses less digits than its factorization.

128431127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614533.

The product of its digits is 2688, while the sum is 29.

The square root of 128431127 is about 11332.7457837896. The cubic root of 128431127 is about 504.5336046160.

Adding to 128431127 its reverse (721134821), we get a palindrome (849565948).

The spelling of 128431127 in words is "one hundred twenty-eight million, four hundred thirty-one thousand, one hundred twenty-seven".