421223242 has 16 divisors (see below), whose sum is σ = 719243712. Its totient is φ = 183140320.

The previous prime is 421223203. The next prime is 421223249. The reversal of 421223242 is 242322124.

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 (421223249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415723 + ... + 416734.

It is an arithmetic number, because the mean of its divisors is an integer number (44952732).

Almost surely, 2^421223242 is an apocalyptic number.

421223242 is a deficient number, since it is larger than the sum of its proper divisors (298020470).

421223242 is a wasteful number, since it uses less digits than its factorization.

421223242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832493.

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

The square root of 421223242 is about 20523.7238823757. The cubic root of 421223242 is about 749.6135739711.

Adding to 421223242 its reverse (242322124), we get a palindrome (663545366).

The spelling of 421223242 in words is "four hundred twenty-one million, two hundred twenty-three thousand, two hundred forty-two".