423402042 has 48 divisors (see below), whose sum is σ = 1036916640. Its totient is φ = 114603552.

The previous prime is 423402029. The next prime is 423402043. The reversal of 423402042 is 240204324.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (423402043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32313 + ... + 43484.

It is an arithmetic number, because the mean of its divisors is an integer number (21602430).

Almost surely, 2^423402042 is an apocalyptic number.

423402042 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

423402042 is an abundant number, since it is smaller than the sum of its proper divisors (613514598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423402042 is a wasteful number, since it uses less digits than its factorization.

423402042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75835 (or 75828 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 423402042 is about 20576.7354553632. The cubic root of 423402042 is about 750.9038241428.

Adding to 423402042 its reverse (240204324), we get a palindrome (663606366).

The spelling of 423402042 in words is "four hundred twenty-three million, four hundred two thousand, forty-two".