128745226 has 4 divisors (see below), whose sum is σ = 193117842. Its totient is φ = 64372612.

The previous prime is 128745217. The next prime is 128745229. The reversal of 128745226 is 622547821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622547821 = 7 ⋅88935403.

It can be written as a sum of positive squares in only one way, i.e., 126540001 + 2205225 = 11249^2 + 1485^2 .

It is not an unprimeable number, because it can be changed into a prime (128745229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32186305 + ... + 32186308.

Almost surely, 2^128745226 is an apocalyptic number.

128745226 is a deficient number, since it is larger than the sum of its proper divisors (64372616).

128745226 is an equidigital number, since it uses as much as digits as its factorization.

128745226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64372615.

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

The square root of 128745226 is about 11346.5953483853. The cubic root of 128745226 is about 504.9445758211.

The spelling of 128745226 in words is "one hundred twenty-eight million, seven hundred forty-five thousand, two hundred twenty-six".