865942401 has 8 divisors (see below), whose sum is σ = 1155344320. Its totient is φ = 576917712.

The previous prime is 865942373. The next prime is 865942421. The reversal of 865942401 is 104249568.

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

It is not a de Polignac number, because 865942401 - 2⁵ = 865942369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865942401.

It is not an unprimeable number, because it can be changed into a prime (865942421) 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, 88906 + ... + 98163.

It is an arithmetic number, because the mean of its divisors is an integer number (144418040).

Almost surely, 2^865942401 is an apocalyptic number.

It is an amenable number.

865942401 is a deficient number, since it is larger than the sum of its proper divisors (289401919).

865942401 is a wasteful number, since it uses less digits than its factorization.

865942401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188615.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 865942401 is about 29426.8992760026. The cubic root of 865942401 is about 953.1538398956.

The spelling of 865942401 in words is "eight hundred sixty-five million, nine hundred forty-two thousand, four hundred one".