81454124 has 6 divisors (see below), whose sum is σ = 142544724. Its totient is φ = 40727060.

The previous prime is 81454103. The next prime is 81454133. The reversal of 81454124 is 42145418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181762 + ... + 10181769.

It is an arithmetic number, because the mean of its divisors is an integer number (23757454).

Almost surely, 2^81454124 is an apocalyptic number.

It is an amenable number.

81454124 is a deficient number, since it is larger than the sum of its proper divisors (61090600).

81454124 is a wasteful number, since it uses less digits than its factorization.

81454124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20363535 (or 20363533 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 81454124 is about 9025.1938483337. The cubic root of 81454124 is about 433.4819574348.

The spelling of 81454124 in words is "eighty-one million, four hundred fifty-four thousand, one hundred twenty-four".