1283821 has 8 divisors (see below), whose sum is σ = 1600704. Its totient is φ = 1000320.

The previous prime is 1283797. The next prime is 1283831.

1283821 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1283821 - 2¹¹ = 1281773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8260 + ... + 8413.

It is an arithmetic number, because the mean of its divisors is an integer number (200088).

2^1283821 is an apocalyptic number.

1283821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1283821 is a deficient number, since it is larger than the sum of its proper divisors (316883).

1283821 is a wasteful number, since it uses less digits than its factorization.

1283821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16691.

The product of its digits is 768, while the sum is 25.

The square root of 1283821 is about 1133.0582509298. The cubic root of 1283821 is about 108.6846368130.

The spelling of 1283821 in words is "one million, two hundred eighty-three thousand, eight hundred twenty-one".