42308423 has 4 divisors (see below), whose sum is σ = 42939960. Its totient is φ = 41676888.

The previous prime is 42308411. The next prime is 42308429. The reversal of 42308423 is 32480324.

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 42308423 - 2⁴ = 42308407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42308392 and 42308401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42308429) 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, 315668 + ... + 315801.

It is an arithmetic number, because the mean of its divisors is an integer number (10734990).

Almost surely, 2^42308423 is an apocalyptic number.

42308423 is a deficient number, since it is larger than the sum of its proper divisors (631537).

42308423 is an equidigital number, since it uses as much as digits as its factorization.

42308423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631536.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 42308423 is about 6504.4925244019. The cubic root of 42308423 is about 348.4514525558.

Adding to 42308423 its reverse (32480324), we get a palindrome (74788747).

The spelling of 42308423 in words is "forty-two million, three hundred eight thousand, four hundred twenty-three".