421312042 has 32 divisors (see below), whose sum is σ = 682214400. Its totient is φ = 194510448.

The previous prime is 421312033. The next prime is 421312057. The reversal of 421312042 is 240213124.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 748053 + ... + 748615.

It is an arithmetic number, because the mean of its divisors is an integer number (21319200).

Almost surely, 2^421312042 is an apocalyptic number.

421312042 is a deficient number, since it is larger than the sum of its proper divisors (260902358).

421312042 is a wasteful number, since it uses less digits than its factorization.

421312042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421312042 is about 20525.8871184658. The cubic root of 421312042 is about 749.6662467597. Note that the first 3 decimals are identical.

Adding to 421312042 its reverse (240213124), we get a palindrome (661525166).

The spelling of 421312042 in words is "four hundred twenty-one million, three hundred twelve thousand, forty-two".