91245580 has 12 divisors (see below), whose sum is σ = 191615760. Its totient is φ = 36498224.

The previous prime is 91245533. The next prime is 91245587. The reversal of 91245580 is 8554219.

It is not an unprimeable number, because it can be changed into a prime (91245587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2281120 + ... + 2281159.

It is an arithmetic number, because the mean of its divisors is an integer number (15967980).

Almost surely, 2^91245580 is an apocalyptic number.

It is an amenable number.

91245580 is an abundant number, since it is smaller than the sum of its proper divisors (100370180).

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

91245580 is a wasteful number, since it uses less digits than its factorization.

91245580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562288 (or 4562286 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 91245580 is about 9552.2552310960. The cubic root of 91245580 is about 450.1983981132.

Adding to 91245580 its reverse (8554219), we get a palindrome (99799799).

The spelling of 91245580 in words is "ninety-one million, two hundred forty-five thousand, five hundred eighty".