1321424 has 20 divisors (see below), whose sum is σ = 2757636. Its totient is φ = 609792.

The previous prime is 1321421. The next prime is 1321429. The reversal of 1321424 is 4241231.

It can be written as a sum of positive squares in 2 ways, for example, as 384400 + 937024 = 620^2 + 968^2 .

It is a super-2 number, since 2×1321424² = 3492322775552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2969 + ... + 3384.

2^1321424 is an apocalyptic number.

It is an amenable number.

1321424 is an abundant number, since it is smaller than the sum of its proper divisors (1436212).

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

1321424 is a wasteful number, since it uses less digits than its factorization.

1321424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6374 (or 6368 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 1321424 is about 1149.5320787172. The cubic root of 1321424 is about 109.7355631579.

Adding to 1321424 its reverse (4241231), we get a palindrome (5562655).

The spelling of 1321424 in words is "one million, three hundred twenty-one thousand, four hundred twenty-four".