81265476 has 12 divisors (see below), whose sum is σ = 189619472. Its totient is φ = 27088488.

The previous prime is 81265433. The next prime is 81265487. The reversal of 81265476 is 67456218.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3386050 + ... + 3386073.

Almost surely, 2^81265476 is an apocalyptic number.

It is an amenable number.

81265476 is an abundant number, since it is smaller than the sum of its proper divisors (108353996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81265476 is a wasteful number, since it uses less digits than its factorization.

81265476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772130 (or 6772128 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 81265476 is about 9014.7366018093. The cubic root of 81265476 is about 433.1470502403.

The spelling of 81265476 in words is "eighty-one million, two hundred sixty-five thousand, four hundred seventy-six".