421210042 has 16 divisors (see below), whose sum is σ = 689630112. Its totient is φ = 191354320.

The previous prime is 421210021. The next prime is 421210057. The reversal of 421210042 is 240012124.

It is a junction number, because it is equal to n+sod(n) for n = 421209998 and 421210025.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47793 + ... + 55915.

It is an arithmetic number, because the mean of its divisors is an integer number (43101882).

Almost surely, 2^421210042 is an apocalyptic number.

421210042 is a deficient number, since it is larger than the sum of its proper divisors (268420070).

421210042 is a wasteful number, since it uses less digits than its factorization.

421210042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10493.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 421210042 is about 20523.4023007882. The cubic root of 421210042 is about 749.6057436003.

Adding to 421210042 its reverse (240012124), we get a palindrome (661222166).

The spelling of 421210042 in words is "four hundred twenty-one million, two hundred ten thousand, forty-two".