100427 has 4 divisors (see below), whose sum is σ = 103920. Its totient is φ = 96936.

The previous prime is 100417. The next prime is 100447. The reversal of 100427 is 724001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100427 - 2⁴ = 100411 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703 + ... + 1760.

It is an arithmetic number, because the mean of its divisors is an integer number (25980).

2¹⁰⁰⁴²⁷ is an apocalyptic number.

100427 is a deficient number, since it is larger than the sum of its proper divisors (3493).

100427 is an equidigital number, since it uses as much as digits as its factorization.

100427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 100427 is about 316.9021931133. The cubic root of 100427 is about 46.4818598067.

Adding to 100427 its reverse (724001), we get a palindrome (824428).

The spelling of 100427 in words is "one hundred thousand, four hundred twenty-seven", and thus it is an iban number.