100249 has 4 divisors (see below), whose sum is σ = 106164. Its totient is φ = 94336.

The previous prime is 100237. The next prime is 100267. The reversal of 100249 is 942001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85849 + 14400 = 293^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 100249 - 2¹⁵ = 67481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100279) 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, 2932 + ... + 2965.

It is an arithmetic number, because the mean of its divisors is an integer number (26541).

2¹⁰⁰²⁴⁹ is an apocalyptic number.

It is an amenable number.

100249 is a deficient number, since it is larger than the sum of its proper divisors (5915).

100249 is an equidigital number, since it uses as much as digits as its factorization.

100249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5914.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 100249 is about 316.6212248097. The cubic root of 100249 is about 46.4543815917.

The spelling of 100249 in words is "one hundred thousand, two hundred forty-nine".