1281424 has 15 divisors (see below), whose sum is σ = 2491563. Its totient is φ = 638448.

The previous prime is 1281407. The next prime is 1281431. The reversal of 1281424 is 4241821.

The square root of 1281424 is 1132.

It is a perfect power (a square), and thus also a powerful number.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1281395 and 1281404.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4387 + ... + 4669.

2^1281424 is an apocalyptic number.

1281424 is the 1132-nd square number.

It is an amenable number.

1281424 is a deficient number, since it is larger than the sum of its proper divisors (1210139).

1281424 is an frugal number, since it uses more digits than its factorization.

1281424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 285 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The cubic root of 1281424 is about 108.6169536031.

The spelling of 1281424 in words is "one million, two hundred eighty-one thousand, four hundred twenty-four".