105209842 has 8 divisors (see below), whose sum is σ = 158172336. Its totient is φ = 52485732.

The previous prime is 105209831. The next prime is 105209861. The reversal of 105209842 is 248902501.

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

It is a super-2 number, since 2×105209842² = 22138221707329928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58488 + ... + 60259.

It is an arithmetic number, because the mean of its divisors is an integer number (19771542).

Almost surely, 2^105209842 is an apocalyptic number.

105209842 is a deficient number, since it is larger than the sum of its proper divisors (52962494).

105209842 is a wasteful number, since it uses less digits than its factorization.

105209842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119192.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 105209842 is about 10257.1848964519. The cubic root of 105209842 is about 472.0834652024.

The spelling of 105209842 in words is "one hundred five million, two hundred nine thousand, eight hundred forty-two".