81060120 has 48 divisors (see below), whose sum is σ = 263446560. Its totient is φ = 21615936.

The previous prime is 81060079. The next prime is 81060121. The reversal of 81060120 is 2106018.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 81060093 and 81060102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81060121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112224 + ... + 112943.

It is an arithmetic number, because the mean of its divisors is an integer number (5488470).

Almost surely, 2^81060120 is an apocalyptic number.

It is an amenable number.

81060120 is an abundant number, since it is smaller than the sum of its proper divisors (182386440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81060120 is a wasteful number, since it uses less digits than its factorization.

81060120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225184 (or 225177 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 81060120 is about 9003.3393804743. The cubic root of 81060120 is about 432.7818915870.

Adding to 81060120 its reverse (2106018), we get a palindrome (83166138).

The spelling of 81060120 in words is "eighty-one million, sixty thousand, one hundred twenty".