81244060 has 12 divisors (see below), whose sum is σ = 170612568. Its totient is φ = 32497616.

The previous prime is 81244049. The next prime is 81244061. The reversal of 81244060 is 6044218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81244061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031082 + ... + 2031121.

It is an arithmetic number, because the mean of its divisors is an integer number (14217714).

Almost surely, 2^81244060 is an apocalyptic number.

It is an amenable number.

81244060 is an abundant number, since it is smaller than the sum of its proper divisors (89368508).

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

81244060 is a wasteful number, since it uses less digits than its factorization.

81244060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062212 (or 4062210 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 81244060 is about 9013.5486907211. The cubic root of 81244060 is about 433.1089976229.

Adding to 81244060 its reverse (6044218), we get a palindrome (87288278).

The spelling of 81244060 in words is "eighty-one million, two hundred forty-four thousand, sixty".