42183905 has 4 divisors (see below), whose sum is σ = 50620692. Its totient is φ = 33747120.

The previous prime is 42183899. The next prime is 42183907. The reversal of 42183905 is 50938124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30129121 + 12054784 = 5489^2 + 3472^2 .

It is not a de Polignac number, because 42183905 - 2¹⁶ = 42118369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42183907) 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, 4218386 + ... + 4218395.

It is an arithmetic number, because the mean of its divisors is an integer number (12655173).

Almost surely, 2^42183905 is an apocalyptic number.

It is an amenable number.

42183905 is a deficient number, since it is larger than the sum of its proper divisors (8436787).

42183905 is an equidigital number, since it uses as much as digits as its factorization.

42183905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8436786.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 42183905 is about 6494.9137792584. The cubic root of 42183905 is about 348.1092739367.

The spelling of 42183905 in words is "forty-two million, one hundred eighty-three thousand, nine hundred five".