105421242 has 8 divisors (see below), whose sum is σ = 210842496. Its totient is φ = 35140412.

The previous prime is 105421223. The next prime is 105421273. The reversal of 105421242 is 242124501.

It is a sphenic number, since it is the product of 3 distinct primes.

105421242 is an admirable number.

It is a super-2 number, since 2×105421242² = 22227276529645128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8785098 + ... + 8785109.

It is an arithmetic number, because the mean of its divisors is an integer number (26355312).

Almost surely, 2^105421242 is an apocalyptic number.

105421242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105421242 is a wasteful number, since it uses less digits than its factorization.

105421242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17570212.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 105421242 is about 10267.4846968476. The cubic root of 105421242 is about 472.3994422216.

Adding to 105421242 its reverse (242124501), we get a palindrome (347545743).

The spelling of 105421242 in words is "one hundred five million, four hundred twenty-one thousand, two hundred forty-two".