421431142 has 12 divisors (see below), whose sum is σ = 694839348. Its totient is φ = 191559500.

The previous prime is 421431137. The next prime is 421431149. The reversal of 421431142 is 241134124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421431149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 870484 + ... + 870967.

It is an arithmetic number, because the mean of its divisors is an integer number (57903279).

Almost surely, 2^421431142 is an apocalyptic number.

421431142 is a deficient number, since it is larger than the sum of its proper divisors (273408206).

421431142 is a wasteful number, since it uses less digits than its factorization.

421431142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741475 (or 1741464 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 421431142 is about 20528.7881278949. The cubic root of 421431142 is about 749.7368807388.

Adding to 421431142 its reverse (241134124), we get a palindrome (662565266).

The spelling of 421431142 in words is "four hundred twenty-one million, four hundred thirty-one thousand, one hundred forty-two".