81126300 has 36 divisors (see below), whose sum is σ = 234726296. Its totient is φ = 21633600.

The previous prime is 81126293. The next prime is 81126301. The reversal of 81126300 is 362118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81126301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134911 + ... + 135510.

Almost surely, 2^81126300 is an apocalyptic number.

It is an amenable number.

81126300 is an abundant number, since it is smaller than the sum of its proper divisors (153599996).

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

81126300 is a wasteful number, since it uses less digits than its factorization.

81126300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270438 (or 270431 counting only the distinct ones).

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

The square root of 81126300 is about 9007.0139335964. The cubic root of 81126300 is about 432.8996384088.

Adding to 81126300 its reverse (362118), we get a palindrome (81488418).

The spelling of 81126300 in words is "eighty-one million, one hundred twenty-six thousand, three hundred".