128651469 has 8 divisors (see below), whose sum is σ = 171839040. Its totient is φ = 85615776.

The previous prime is 128651459. The next prime is 128651543. The reversal of 128651469 is 964156821.

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

It is not a de Polignac number, because 128651469 - 2⁵ = 128651437 is a prime.

It is a super-2 number, since 2×128651469² = 33102400951715922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128651469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128651459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35977 + ... + 39390.

It is an arithmetic number, because the mean of its divisors is an integer number (21479880).

Almost surely, 2^128651469 is an apocalyptic number.

It is an amenable number.

128651469 is a deficient number, since it is larger than the sum of its proper divisors (43187571).

128651469 is an equidigital number, since it uses as much as digits as its factorization.

128651469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75939.

The product of its digits is 103680, while the sum is 42.

The square root of 128651469 is about 11342.4630922917. The cubic root of 128651469 is about 504.8219729959.

The spelling of 128651469 in words is "one hundred twenty-eight million, six hundred fifty-one thousand, four hundred sixty-nine".