81042027 has 16 divisors (see below), whose sum is σ = 119543040. Its totient is φ = 48423200.

The previous prime is 81042019. The next prime is 81042103. The reversal of 81042027 is 72024018.

It is a cyclic number.

It is not a de Polignac number, because 81042027 - 2³ = 81042019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81041988 and 81042006.

It is not an unprimeable number, because it can be changed into a prime (81042007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14952 + ... + 19637.

It is an arithmetic number, because the mean of its divisors is an integer number (7471440).

Almost surely, 2^81042027 is an apocalyptic number.

81042027 is a deficient number, since it is larger than the sum of its proper divisors (38501013).

81042027 is a wasteful number, since it uses less digits than its factorization.

81042027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34674.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 81042027 is about 9002.3345305537. The cubic root of 81042027 is about 432.7496895399.

Subtracting from 81042027 its reverse (72024018), we obtain a square (9018009 = 3003²).

The spelling of 81042027 in words is "eighty-one million, forty-two thousand, twenty-seven".