42243405 has 16 divisors (see below), whose sum is σ = 68351040. Its totient is φ = 22275968.

The previous prime is 42243389. The next prime is 42243413. The reversal of 42243405 is 50434224.

It is a cyclic number.

It is not a de Polignac number, because 42243405 - 2⁴ = 42243389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14487 + ... + 17156.

It is an arithmetic number, because the mean of its divisors is an integer number (4271940).

Almost surely, 2^42243405 is an apocalyptic number.

It is an amenable number.

42243405 is a deficient number, since it is larger than the sum of its proper divisors (26107635).

42243405 is a wasteful number, since it uses less digits than its factorization.

42243405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31740.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 42243405 is about 6499.4926725091. The cubic root of 42243405 is about 348.2728653283.

Adding to 42243405 its reverse (50434224), we get a palindrome (92677629).

The spelling of 42243405 in words is "forty-two million, two hundred forty-three thousand, four hundred five".