812481861 has 16 divisors (see below), whose sum is σ = 1127301120. Its totient is φ = 520086000.

The previous prime is 812481851. The next prime is 812481863. The reversal of 812481861 is 168184218.

It is not a de Polignac number, because 812481861 - 2⁵ = 812481829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812481863) 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, 45765 + ... + 60986.

It is an arithmetic number, because the mean of its divisors is an integer number (70456320).

Almost surely, 2^812481861 is an apocalyptic number.

It is an amenable number.

812481861 is a deficient number, since it is larger than the sum of its proper divisors (314819259).

812481861 is a wasteful number, since it uses less digits than its factorization.

812481861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106856.

The product of its digits is 24576, while the sum is 39.

The square root of 812481861 is about 28504.0674465944. The cubic root of 812481861 is about 933.1208451506.

The spelling of 812481861 in words is "eight hundred twelve million, four hundred eighty-one thousand, eight hundred sixty-one".