100273145 has 16 divisors (see below), whose sum is σ = 141235968. Its totient is φ = 66899520.

The previous prime is 100273141. The next prime is 100273153. The reversal of 100273145 is 541372001.

It is not a de Polignac number, because 100273145 - 2² = 100273141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100273145.

It is not an unprimeable number, because it can be changed into a prime (100273141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37421 + ... + 40010.

It is an arithmetic number, because the mean of its divisors is an integer number (8827248).

Almost surely, 2^100273145 is an apocalyptic number.

It is an amenable number.

100273145 is a deficient number, since it is larger than the sum of its proper divisors (40962823).

100273145 is an equidigital number, since it uses as much as digits as its factorization.

100273145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77480.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 100273145 is about 10013.6479366912. The cubic root of 100273145 is about 464.5811080930.

It can be divided in two parts, 1002 and 73145, that added together give a palindrome (74147).

The spelling of 100273145 in words is "one hundred million, two hundred seventy-three thousand, one hundred forty-five".