81120430 has 32 divisors (see below), whose sum is σ = 155061216. Its totient is φ = 30449664.

The previous prime is 81120407. The next prime is 81120433. The reversal of 81120430 is 3402118.

It is a junction number, because it is equal to n+sod(n) for n = 81120398 and 81120407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81120433) 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, 97677 + ... + 98503.

It is an arithmetic number, because the mean of its divisors is an integer number (4845663).

Almost surely, 2^81120430 is an apocalyptic number.

81120430 is a deficient number, since it is larger than the sum of its proper divisors (73940786).

81120430 is a wasteful number, since it uses less digits than its factorization.

81120430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 81120430 is about 9006.6880705396. The cubic root of 81120430 is about 432.8891971497.

Adding to 81120430 its reverse (3402118), we get a palindrome (84522548).

The spelling of 81120430 in words is "eighty-one million, one hundred twenty thousand, four hundred thirty".