100420243 has 16 divisors (see below), whose sum is σ = 129519360. Its totient is φ = 75549600.

The previous prime is 100420217. The next prime is 100420261. The reversal of 100420243 is 342024001.

It is a de Polignac number, because none of the positive numbers 2^k-100420243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100420843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20253 + ... + 24718.

It is an arithmetic number, because the mean of its divisors is an integer number (8094960).

Almost surely, 2^100420243 is an apocalyptic number.

100420243 is a deficient number, since it is larger than the sum of its proper divisors (29099117).

100420243 is a wasteful number, since it uses less digits than its factorization.

100420243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45018.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 100420243 is about 10020.9901207416. The cubic root of 100420243 is about 464.8081730828.

Adding to 100420243 its reverse (342024001), we get a palindrome (442444244).

The spelling of 100420243 in words is "one hundred million, four hundred twenty thousand, two hundred forty-three".