865280101 has 16 divisors (see below), whose sum is σ = 997920000. Its totient is φ = 734923008.

The previous prime is 865280089. The next prime is 865280123. The reversal of 865280101 is 101082568.

It is a cyclic number.

It is not a de Polignac number, because 865280101 - 2⁷ = 865279973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865280191) 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 15 ways as a sum of consecutive naturals, for example, 617800 + ... + 619198.

It is an arithmetic number, because the mean of its divisors is an integer number (62370000).

Almost surely, 2^865280101 is an apocalyptic number.

It is an amenable number.

865280101 is a deficient number, since it is larger than the sum of its proper divisors (132639899).

865280101 is a wasteful number, since it uses less digits than its factorization.

865280101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 865280101 is about 29415.6438141340. The cubic root of 865280101 is about 952.9107772334.

The spelling of 865280101 in words is "eight hundred sixty-five million, two hundred eighty thousand, one hundred one".