42423455 has 4 divisors (see below), whose sum is σ = 50908152. Its totient is φ = 33938760.

The previous prime is 42423443. The next prime is 42423457. The reversal of 42423455 is 55432424.

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

It is not a de Polignac number, because 42423455 - 2¹⁰ = 42422431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42423457) 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, 4242341 + ... + 4242350.

It is an arithmetic number, because the mean of its divisors is an integer number (12727038).

Almost surely, 2^42423455 is an apocalyptic number.

42423455 is a deficient number, since it is larger than the sum of its proper divisors (8484697).

42423455 is an equidigital number, since it uses as much as digits as its factorization.

42423455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8484696.

The product of its digits is 19200, while the sum is 29.

The square root of 42423455 is about 6513.3290259283. The cubic root of 42423455 is about 348.7669673104.

Adding to 42423455 its reverse (55432424), we get a palindrome (97855879).

The spelling of 42423455 in words is "forty-two million, four hundred twenty-three thousand, four hundred fifty-five".