421140242 has 8 divisors (see below), whose sum is σ = 632752896. Its totient is φ = 210222612.

The previous prime is 421140211. The next prime is 421140259. The reversal of 421140242 is 242041124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172238 + ... + 174665.

It is an arithmetic number, because the mean of its divisors is an integer number (79094112).

Almost surely, 2^421140242 is an apocalyptic number.

421140242 is a deficient number, since it is larger than the sum of its proper divisors (211612654).

421140242 is a wasteful number, since it uses less digits than its factorization.

421140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347512.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 421140242 is about 20521.7017325562. The cubic root of 421140242 is about 749.5643348287.

Adding to 421140242 its reverse (242041124), we get a palindrome (663181366).

The spelling of 421140242 in words is "four hundred twenty-one million, one hundred forty thousand, two hundred forty-two".