81146135 has 16 divisors (see below), whose sum is σ = 111960576. Its totient is φ = 55305888.

The previous prime is 81146129. The next prime is 81146141. The reversal of 81146135 is 53164118.

It is an interprime number because it is at equal distance from previous prime (81146129) and next prime (81146141).

It is a cyclic number.

It is not a de Polignac number, because 81146135 - 2¹⁴ = 81129751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81146098 and 81146107.

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 15 ways as a sum of consecutive naturals, for example, 1097 + ... + 12786.

It is an arithmetic number, because the mean of its divisors is an integer number (6997536).

Almost surely, 2^81146135 is an apocalyptic number.

81146135 is a deficient number, since it is larger than the sum of its proper divisors (30814441).

81146135 is a wasteful number, since it uses less digits than its factorization.

81146135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062.

The product of its digits is 2880, while the sum is 29.

The square root of 81146135 is about 9008.1149526413. The cubic root of 81146135 is about 432.9349161779.

The spelling of 81146135 in words is "eighty-one million, one hundred forty-six thousand, one hundred thirty-five".