81276135 has 32 divisors (see below), whose sum is σ = 137272320. Its totient is φ = 40981248.

The previous prime is 81276109. The next prime is 81276137. The reversal of 81276135 is 53167218.

It is not a de Polignac number, because 81276135 - 2⁸ = 81275879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81276096 and 81276105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81276137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29382 + ... + 32028.

It is an arithmetic number, because the mean of its divisors is an integer number (4289760).

Almost surely, 2^81276135 is an apocalyptic number.

81276135 is a deficient number, since it is larger than the sum of its proper divisors (55996185).

81276135 is a wasteful number, since it uses less digits than its factorization.

81276135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767.

The product of its digits is 10080, while the sum is 33.

The square root of 81276135 is about 9015.3277810626. The cubic root of 81276135 is about 433.1659869926.

The spelling of 81276135 in words is "eighty-one million, two hundred seventy-six thousand, one hundred thirty-five".