421243142 has 16 divisors (see below), whose sum is σ = 649557792. Its totient is φ = 204805440.

The previous prime is 421243103. The next prime is 421243157. The reversal of 421243142 is 241342124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9953 + ... + 30684.

It is an arithmetic number, because the mean of its divisors is an integer number (40597362).

Almost surely, 2^421243142 is an apocalyptic number.

421243142 is a deficient number, since it is larger than the sum of its proper divisors (228314650).

421243142 is a wasteful number, since it uses less digits than its factorization.

421243142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40783.

The product of its digits is 1536, while the sum is 23.

The square root of 421243142 is about 20524.2086814571. The cubic root of 421243142 is about 749.6253785391.

Adding to 421243142 its reverse (241342124), we get a palindrome (662585266).

The spelling of 421243142 in words is "four hundred twenty-one million, two hundred forty-three thousand, one hundred forty-two".