42440205 has 16 divisors (see below), whose sum is σ = 71478720. Its totient is φ = 21443328.

The previous prime is 42440197. The next prime is 42440249. The reversal of 42440205 is 50204424.

It is not a de Polignac number, because 42440205 - 2³ = 42440197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74172 + ... + 74741.

It is an arithmetic number, because the mean of its divisors is an integer number (4467420).

Almost surely, 2^42440205 is an apocalyptic number.

It is an amenable number.

42440205 is a deficient number, since it is larger than the sum of its proper divisors (29038515).

42440205 is a wasteful number, since it uses less digits than its factorization.

42440205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148940.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42440205 is about 6514.6147238344. The cubic root of 42440205 is about 348.8128623467.

Adding to 42440205 its reverse (50204424), we get a palindrome (92644629).

The spelling of 42440205 in words is "forty-two million, four hundred forty thousand, two hundred five".