81126030 has 32 divisors (see below), whose sum is σ = 196020000. Its totient is φ = 21487232.

The previous prime is 81125999. The next prime is 81126041. The reversal of 81126030 is 3062118.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81125988 and 81126006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4605 + ... + 13544.

It is an arithmetic number, because the mean of its divisors is an integer number (6125625).

Almost surely, 2^81126030 is an apocalyptic number.

81126030 is an abundant number, since it is smaller than the sum of its proper divisors (114893970).

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

81126030 is a wasteful number, since it uses less digits than its factorization.

81126030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18308.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 81126030 is about 9006.9989452647. The cubic root of 81126030 is about 432.8991581575.

Adding to 81126030 its reverse (3062118), we get a palindrome (84188148).

The spelling of 81126030 in words is "eighty-one million, one hundred twenty-six thousand, thirty".