128514731 has 12 divisors (see below), whose sum is σ = 134909880. Its totient is φ = 122411520.

The previous prime is 128514721. The next prime is 128514733. The reversal of 128514731 is 137415821.

It is not a de Polignac number, because 128514731 - 2⁶ = 128514667 is a prime.

It is a super-2 number, since 2×128514731² = 33032072168004722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128514733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200171 + ... + 200811.

It is an arithmetic number, because the mean of its divisors is an integer number (11242490).

Almost surely, 2^128514731 is an apocalyptic number.

128514731 is a deficient number, since it is larger than the sum of its proper divisors (6395149).

128514731 is an equidigital number, since it uses as much as digits as its factorization.

128514731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1043 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 128514731 is about 11336.4337866897. The cubic root of 128514731 is about 504.6430585545.

The spelling of 128514731 in words is "one hundred twenty-eight million, five hundred fourteen thousand, seven hundred thirty-one".