128422737 has 6 divisors (see below), whose sum is σ = 185499522. Its totient is φ = 85615152.

The previous prime is 128422733. The next prime is 128422757. The reversal of 128422737 is 737224821.

It can be written as a sum of positive squares in only one way, i.e., 128051856 + 370881 = 11316^2 + 609^2 .

It is not a de Polignac number, because 128422737 - 2² = 128422733 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128422733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7134588 + ... + 7134605.

It is an arithmetic number, because the mean of its divisors is an integer number (30916587).

Almost surely, 2^128422737 is an apocalyptic number.

It is an amenable number.

128422737 is a deficient number, since it is larger than the sum of its proper divisors (57076785).

128422737 is a wasteful number, since it uses less digits than its factorization.

128422737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14269199 (or 14269196 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 128422737 is about 11332.3756114947. The cubic root of 128422737 is about 504.5226178477.

The spelling of 128422737 in words is "one hundred twenty-eight million, four hundred twenty-two thousand, seven hundred thirty-seven".