1021424 has 10 divisors (see below), whose sum is σ = 1979040. Its totient is φ = 510704.

The previous prime is 1021417. The next prime is 1021429. The reversal of 1021424 is 4241201.

It is a junction number, because it is equal to n+sod(n) for n = 1021399 and 1021408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31904 + ... + 31935.

It is an arithmetic number, because the mean of its divisors is an integer number (197904).

2^1021424 is an apocalyptic number.

It is an amenable number.

1021424 is a deficient number, since it is larger than the sum of its proper divisors (957616).

1021424 is an equidigital number, since it uses as much as digits as its factorization.

1021424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63847 (or 63841 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1021424 is about 1010.6552330048. The cubic root of 1021424 is about 100.7090933153.

Adding to 1021424 its reverse (4241201), we get a palindrome (5262625).

The spelling of 1021424 in words is "one million, twenty-one thousand, four hundred twenty-four".