128256562 has 8 divisors (see below), whose sum is σ = 219868416. Its totient is φ = 54967092.

The previous prime is 128256529. The next prime is 128256577. The reversal of 128256562 is 265652821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4580578 + ... + 4580605.

It is an arithmetic number, because the mean of its divisors is an integer number (27483552).

Almost surely, 2^128256562 is an apocalyptic number.

128256562 is a deficient number, since it is larger than the sum of its proper divisors (91611854).

128256562 is an equidigital number, since it uses as much as digits as its factorization.

128256562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9161192.

The product of its digits is 57600, while the sum is 37.

The square root of 128256562 is about 11325.0413685779. The cubic root of 128256562 is about 504.3049117631.

The spelling of 128256562 in words is "one hundred twenty-eight million, two hundred fifty-six thousand, five hundred sixty-two".