91245530 has 8 divisors (see below), whose sum is σ = 164241972. Its totient is φ = 36498208.

The previous prime is 91245529. The next prime is 91245533. The reversal of 91245530 is 3554219.

It can be written as a sum of positive squares in 2 ways, for example, as 90992521 + 253009 = 9539^2 + 503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91245493 and 91245502.

It is not an unprimeable number, because it can be changed into a prime (91245533) 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, 4562267 + ... + 4562286.

Almost surely, 2^91245530 is an apocalyptic number.

91245530 is a deficient number, since it is larger than the sum of its proper divisors (72996442).

91245530 is a wasteful number, since it uses less digits than its factorization.

91245530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9124560.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 91245530 is about 9552.2526139126. The cubic root of 91245530 is about 450.1983158811.

Adding to 91245530 its reverse (3554219), we get a palindrome (94799749).

The spelling of 91245530 in words is "ninety-one million, two hundred forty-five thousand, five hundred thirty".