81014542 has 20 divisors (see below), whose sum is σ = 141775416. Its totient is φ = 34718460.

The previous prime is 81014519. The next prime is 81014551. The reversal of 81014542 is 24541018.

It is a congruent number.

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 in 9 ways as a sum of consecutive naturals, for example, 3634 + ... + 13237.

Almost surely, 2^81014542 is an apocalyptic number.

81014542 is a deficient number, since it is larger than the sum of its proper divisors (60760874).

81014542 is an equidigital number, since it uses as much as digits as its factorization.

81014542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16901 (or 16880 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 81014542 is about 9000.8078526319. The cubic root of 81014542 is about 432.7007623740.

The spelling of 81014542 in words is "eighty-one million, fourteen thousand, five hundred forty-two".