421523042 has 16 divisors (see below), whose sum is σ = 636530400. Its totient is φ = 209351520.

The previous prime is 421523029. The next prime is 421523051. The reversal of 421523042 is 240325124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421522999 and 421523017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212009 + ... + 213987.

It is an arithmetic number, because the mean of its divisors is an integer number (39783150).

Almost surely, 2^421523042 is an apocalyptic number.

421523042 is a deficient number, since it is larger than the sum of its proper divisors (215007358).

421523042 is a wasteful number, since it uses less digits than its factorization.

421523042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421523042 is about 20531.0263260267. The cubic root of 421523042 is about 749.7913742687.

Adding to 421523042 its reverse (240325124), we get a palindrome (661848166).

The spelling of 421523042 in words is "four hundred twenty-one million, five hundred twenty-three thousand, forty-two".