811245105 has 48 divisors (see below), whose sum is σ = 1585274880. Its totient is φ = 393323040.

The previous prime is 811245067. The next prime is 811245119. The reversal of 811245105 is 501542118.

It is not a de Polignac number, because 811245105 - 2⁸ = 811244849 is a prime.

It is a super-2 number, since 2×811245105² = 1316237240772922050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8497 + ... + 41166.

It is an arithmetic number, because the mean of its divisors is an integer number (33026560).

Almost surely, 2^811245105 is an apocalyptic number.

It is an amenable number.

811245105 is a deficient number, since it is larger than the sum of its proper divisors (774029775).

811245105 is a wasteful number, since it uses less digits than its factorization.

811245105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49699 (or 49682 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 811245105 is about 28482.3648070170. The cubic root of 811245105 is about 932.6471406843.

The spelling of 811245105 in words is "eight hundred eleven million, two hundred forty-five thousand, one hundred five".