42404323 has 4 divisors (see below), whose sum is σ = 45666208. Its totient is φ = 39142440.

The previous prime is 42404269. The next prime is 42404359. The reversal of 42404323 is 32340424.

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 42404323 - 2¹⁷ = 42273251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42404294 and 42404303.

It is not an unprimeable number, because it can be changed into a prime (42404363) 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, 1630923 + ... + 1630948.

It is an arithmetic number, because the mean of its divisors is an integer number (11416552).

Almost surely, 2^42404323 is an apocalyptic number.

42404323 is a deficient number, since it is larger than the sum of its proper divisors (3261885).

42404323 is a wasteful number, since it uses less digits than its factorization.

42404323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261884.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 42404323 is about 6511.8601797029. The cubic root of 42404323 is about 348.7145308069.

Adding to 42404323 its reverse (32340424), we get a palindrome (74744747).

The spelling of 42404323 in words is "forty-two million, four hundred four thousand, three hundred twenty-three".