1021421424 has 20 divisors (see below), whose sum is σ = 2638672136. Its totient is φ = 340473792.

The previous prime is 1021421419. The next prime is 1021421483. The reversal of 1021421424 is 4241241201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021421424.

It is a congruent number.

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, 10639759 + ... + 10639854.

Almost surely, 2^1021421424 is an apocalyptic number.

It is an amenable number.

1021421424 is an abundant number, since it is smaller than the sum of its proper divisors (1617250712).

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

1021421424 is a wasteful number, since it uses less digits than its factorization.

1021421424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21279624 (or 21279618 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1021421424 is about 31959.6843538856. The cubic root of 1021421424 is about 1007.0900865350.

Adding to 1021421424 its reverse (4241241201), we get a palindrome (5262662625).

The spelling of 1021421424 in words is "one billion, twenty-one million, four hundred twenty-one thousand, four hundred twenty-four".