861276801 has 16 divisors (see below), whose sum is σ = 1431733248. Its totient is φ = 447416400.

The previous prime is 861276781. The next prime is 861276803. The reversal of 861276801 is 108672168.

It is not a de Polignac number, because 861276801 - 2⁶ = 861276737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 861276801.

It is not an unprimeable number, because it can be changed into a prime (861276803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1864005 + ... + 1864466.

It is an arithmetic number, because the mean of its divisors is an integer number (89483328).

Almost surely, 2^861276801 is an apocalyptic number.

It is an amenable number.

861276801 is a deficient number, since it is larger than the sum of its proper divisors (570456447).

861276801 is a wasteful number, since it uses less digits than its factorization.

861276801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728492.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 861276801 is about 29347.5177996368. The cubic root of 861276801 is about 951.4389278146.

The spelling of 861276801 in words is "eight hundred sixty-one million, two hundred seventy-six thousand, eight hundred one".