42105199 has 4 divisors (see below), whose sum is σ = 42436864. Its totient is φ = 41773536.

The previous prime is 42105191. The next prime is 42105211. The reversal of 42105199 is 99150124.

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

It is a cyclic number.

It is not a de Polignac number, because 42105199 - 2³ = 42105191 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 42105199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42105191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165642 + ... + 165895.

It is an arithmetic number, because the mean of its divisors is an integer number (10609216).

Almost surely, 2^42105199 is an apocalyptic number.

42105199 is a deficient number, since it is larger than the sum of its proper divisors (331665).

42105199 is a wasteful number, since it uses less digits than its factorization.

42105199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331664.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 42105199 is about 6488.8519015308. The cubic root of 42105199 is about 347.8926403972.

It can be divided in two parts, 4210 and 5199, that added together give a square (9409 = 97²).

The spelling of 42105199 in words is "forty-two million, one hundred five thousand, one hundred ninety-nine".