81269124 has 24 divisors (see below), whose sum is σ = 192460128. Its totient is φ = 26685120.

The previous prime is 81269113. The next prime is 81269159. The reversal of 81269124 is 42196218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49737 + ... + 51344.

It is an arithmetic number, because the mean of its divisors is an integer number (8019172).

Almost surely, 2^81269124 is an apocalyptic number.

It is an amenable number.

81269124 is an abundant number, since it is smaller than the sum of its proper divisors (111191004).

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

81269124 is a wasteful number, since it uses less digits than its factorization.

81269124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101155 (or 101153 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 81269124 is about 9014.9389349013. The cubic root of 81269124 is about 433.1535314542.

The spelling of 81269124 in words is "eighty-one million, two hundred sixty-nine thousand, one hundred twenty-four".