423421042 has 32 divisors (see below), whose sum is σ = 736231680. Its totient is φ = 180611280.

The previous prime is 423421013. The next prime is 423421049. The reversal of 423421042 is 240124324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (423421049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39993 + ... + 49459.

It is an arithmetic number, because the mean of its divisors is an integer number (23007240).

Almost surely, 2^423421042 is an apocalyptic number.

423421042 is a deficient number, since it is larger than the sum of its proper divisors (312810638).

423421042 is a wasteful number, since it uses less digits than its factorization.

423421042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9606.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 423421042 is about 20577.1971366365. The cubic root of 423421042 is about 750.9150561460.

Adding to 423421042 its reverse (240124324), we get a palindrome (663545366).

The spelling of 423421042 in words is "four hundred twenty-three million, four hundred twenty-one thousand, forty-two".