840128601 has 8 divisors (see below), whose sum is σ = 1206338560. Its totient is φ = 517002192.

The previous prime is 840128591. The next prime is 840128617. The reversal of 840128601 is 106821048.

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

It is not a de Polignac number, because 840128601 - 2⁶ = 840128537 is a prime.

It is a super-3 number, since 3×840128601³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840128701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10770841 + ... + 10770918.

It is an arithmetic number, because the mean of its divisors is an integer number (150792320).

Almost surely, 2^840128601 is an apocalyptic number.

It is an amenable number.

840128601 is a deficient number, since it is larger than the sum of its proper divisors (366209959).

840128601 is a wasteful number, since it uses less digits than its factorization.

840128601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21541775.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 840128601 is about 28984.9719854962. The cubic root of 840128601 is about 943.5869444129.

Adding to 840128601 its reverse (106821048), we get a palindrome (946949649).

The spelling of 840128601 in words is "eight hundred forty million, one hundred twenty-eight thousand, six hundred one".