42123404 has 12 divisors (see below), whose sum is σ = 74965800. Its totient is φ = 20704608.

The previous prime is 42123401. The next prime is 42123449. The reversal of 42123404 is 40432124.

It is not an unprimeable number, because it can be changed into a prime (42123401) 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, 89009 + ... + 89480.

It is an arithmetic number, because the mean of its divisors is an integer number (6247150).

Almost surely, 2^42123404 is an apocalyptic number.

It is an amenable number.

42123404 is a deficient number, since it is larger than the sum of its proper divisors (32842396).

42123404 is a wasteful number, since it uses less digits than its factorization.

42123404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178552 (or 178550 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42123404 is about 6490.2545404630. The cubic root of 42123404 is about 347.9427725512.

Adding to 42123404 its reverse (40432124), we get a palindrome (82555528).

The spelling of 42123404 in words is "forty-two million, one hundred twenty-three thousand, four hundred four".