100840342 has 4 divisors (see below), whose sum is σ = 151260516. Its totient is φ = 50420170.

The previous prime is 100840321. The next prime is 100840387. The reversal of 100840342 is 243048001.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25210084 + ... + 25210087.

It is an arithmetic number, because the mean of its divisors is an integer number (37815129).

Almost surely, 2^100840342 is an apocalyptic number.

100840342 is a deficient number, since it is larger than the sum of its proper divisors (50420174).

100840342 is an equidigital number, since it uses as much as digits as its factorization.

100840342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50420173.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 100840342 is about 10041.9291971214. The cubic root of 100840342 is about 465.4554323145.

Adding to 100840342 its reverse (243048001), we get a palindrome (343888343).

The spelling of 100840342 in words is "one hundred million, eight hundred forty thousand, three hundred forty-two".