91245 has 32 divisors (see below), whose sum is σ = 184320. Its totient is φ = 37440.

The previous prime is 91243. The next prime is 91249. The reversal of 91245 is 54219.

91245 = T₅₄ + T₅₅ + ... + T₈₈.

It is not a de Polignac number, because 91245 - 2¹ = 91243 is a prime.

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

91245 is a Rhonda number in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91243) 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, 1116 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (5760).

2⁹¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

91245 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92160).

91245 is a wasteful number, since it uses less digits than its factorization.

91245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105.

The product of its digits is 360, while the sum is 21.

The square root of 91245 is about 302.0678731676. The cubic root of 91245 is about 45.0197444220.

The spelling of 91245 in words is "ninety-one thousand, two hundred forty-five".