42012423 has 12 divisors (see below), whose sum is σ = 64254528. Its totient is φ = 26360640.

The previous prime is 42012403. The next prime is 42012431. The reversal of 42012423 is 32421024.

42012423 is a `hidden beast` number, since 420 + 1 + 242 + 3 = 666.

It is not a de Polignac number, because 42012423 - 2⁹ = 42011911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42012396 and 42012405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42012403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137143 + ... + 137448.

It is an arithmetic number, because the mean of its divisors is an integer number (5354544).

Almost surely, 2^42012423 is an apocalyptic number.

42012423 is a deficient number, since it is larger than the sum of its proper divisors (22242105).

42012423 is a wasteful number, since it uses less digits than its factorization.

42012423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274614 (or 274611 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42012423 is about 6481.6990828023. The cubic root of 42012423 is about 347.6369330776.

Adding to 42012423 its reverse (32421024), we get a palindrome (74433447).

The spelling of 42012423 in words is "forty-two million, twelve thousand, four hundred twenty-three".