100245591 has 12 divisors (see below), whose sum is σ = 145668432. Its totient is φ = 66429216.

The previous prime is 100245581. The next prime is 100245611. The reversal of 100245591 is 195542001.

100245591 is a `hidden beast` number, since 100 + 2 + 4 + 559 + 1 = 666.

It is not a de Polignac number, because 100245591 - 2⁵ = 100245559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100245511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31846 + ... + 34851.

It is an arithmetic number, because the mean of its divisors is an integer number (12139036).

Almost surely, 2^100245591 is an apocalyptic number.

100245591 is a deficient number, since it is larger than the sum of its proper divisors (45422841).

100245591 is a wasteful number, since it uses less digits than its factorization.

100245591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66870 (or 66867 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 100245591 is about 10012.2720198764. The cubic root of 100245591 is about 464.5385502026.

Adding to 100245591 its reverse (195542001), we get a palindrome (295787592).

The spelling of 100245591 in words is "one hundred million, two hundred forty-five thousand, five hundred ninety-one".