421145423142 has 16 divisors (see below), whose sum is σ = 844981875120. Its totient is φ = 139933302912.

The previous prime is 421145423131. The next prime is 421145423143. The reversal of 421145423142 is 241324541124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421145423143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112124167 + ... + 112127922.

It is an arithmetic number, because the mean of its divisors is an integer number (52811367195).

Almost surely, 2^421145423142 is an apocalyptic number.

421145423142 is an abundant number, since it is smaller than the sum of its proper divisors (423836451978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421145423142 is a wasteful number, since it uses less digits than its factorization.

421145423142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224252407.

The product of its digits is 30720, while the sum is 33.

Adding to 421145423142 its reverse (241324541124), we get a palindrome (662469964266).

The spelling of 421145423142 in words is "four hundred twenty-one billion, one hundred forty-five million, four hundred twenty-three thousand, one hundred forty-two".