128225463 has 4 divisors (see below), whose sum is σ = 170967288. Its totient is φ = 85483640.

The previous prime is 128225429. The next prime is 128225521. The reversal of 128225463 is 364522821.

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

It is a cyclic number.

It is not a de Polignac number, because 128225463 - 2⁹ = 128224951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128225413) 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, 21370908 + ... + 21370913.

It is an arithmetic number, because the mean of its divisors is an integer number (42741822).

Almost surely, 2^128225463 is an apocalyptic number.

128225463 is a deficient number, since it is larger than the sum of its proper divisors (42741825).

128225463 is an equidigital number, since it uses as much as digits as its factorization.

128225463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42741824.

The product of its digits is 23040, while the sum is 33.

The square root of 128225463 is about 11323.6682660700. The cubic root of 128225463 is about 504.2641480366.

The spelling of 128225463 in words is "one hundred twenty-eight million, two hundred twenty-five thousand, four hundred sixty-three".