81270959 has 24 divisors (see below), whose sum is σ = 104011776. Its totient is φ = 62790000.

The previous prime is 81270953. The next prime is 81270977. The reversal of 81270959 is 95907218.

It is not a de Polignac number, because 81270959 - 2⁸ = 81270703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81270953) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 70034 + ... + 71184.

It is an arithmetic number, because the mean of its divisors is an integer number (4333824).

Almost surely, 2^81270959 is an apocalyptic number.

81270959 is a deficient number, since it is larger than the sum of its proper divisors (22740817).

81270959 is a wasteful number, since it uses less digits than its factorization.

81270959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 81270959 is about 9015.0407098360. The cubic root of 81270959 is about 433.1567915310.

The spelling of 81270959 in words is "eighty-one million, two hundred seventy thousand, nine hundred fifty-nine".