91056 has 40 divisors (see below), whose sum is σ = 269824. Its totient is φ = 25920.

The previous prime is 91033. The next prime is 91079. The reversal of 91056 is 65019.

It is an interprime number because it is at equal distance from previous prime (91033) and next prime (91079).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

91056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201 + ... + 471.

2⁹¹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134912).

91056 is an abundant number, since it is smaller than the sum of its proper divisors (178768).

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

91056 is a wasteful number, since it uses less digits than its factorization.

91056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 91056 is about 301.7548674007. The cubic root of 91056 is about 44.9886391073.

The spelling of 91056 in words is "ninety-one thousand, fifty-six".