128226745 has 4 divisors (see below), whose sum is σ = 153872100. Its totient is φ = 102581392.

The previous prime is 128226743. The next prime is 128226773. The reversal of 128226745 is 547622821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67947049 + 60279696 = 8243^2 + 7764^2 .

It is a cyclic number.

It is not a de Polignac number, because 128226745 - 2¹ = 128226743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128226743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12822670 + ... + 12822679.

It is an arithmetic number, because the mean of its divisors is an integer number (38468025).

Almost surely, 2^128226745 is an apocalyptic number.

It is an amenable number.

128226745 is a deficient number, since it is larger than the sum of its proper divisors (25645355).

128226745 is an equidigital number, since it uses as much as digits as its factorization.

128226745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25645354.

The product of its digits is 53760, while the sum is 37.

The square root of 128226745 is about 11323.7248730265. The cubic root of 128226745 is about 504.2658285777.

The spelling of 128226745 in words is "one hundred twenty-eight million, two hundred twenty-six thousand, seven hundred forty-five".