1021421342 has 24 divisors (see below), whose sum is σ = 1631975400. Its totient is φ = 479355408.

The previous prime is 1021421341. The next prime is 1021421347. The reversal of 1021421342 is 2431241201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021421341) 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 11 ways as a sum of consecutive naturals, for example, 72209 + ... + 85187.

It is an arithmetic number, because the mean of its divisors is an integer number (67998975).

Almost surely, 2^1021421342 is an apocalyptic number.

1021421342 is a deficient number, since it is larger than the sum of its proper divisors (610554058).

1021421342 is a wasteful number, since it uses less digits than its factorization.

1021421342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13128 (or 13109 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1021421342 is about 31959.6830710193. The cubic root of 1021421342 is about 1007.0900595851.

Adding to 1021421342 its reverse (2431241201), we get a palindrome (3452662543).

The spelling of 1021421342 in words is "one billion, twenty-one million, four hundred twenty-one thousand, three hundred forty-two".