1383021 has 16 divisors (see below), whose sum is σ = 2067520. Its totient is φ = 913680.

The previous prime is 1382999. The next prime is 1383037. The reversal of 1383021 is 1203831.

It is not a de Polignac number, because 1383021 - 2⁵ = 1382989 is a prime.

It is a Duffinian number.

1383021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1382985 and 1383003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4746 + ... + 5028.

It is an arithmetic number, because the mean of its divisors is an integer number (129220).

2^1383021 is an apocalyptic number.

It is an amenable number.

1383021 is a deficient number, since it is larger than the sum of its proper divisors (684499).

1383021 is a wasteful number, since it uses less digits than its factorization.

1383021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1383021 is about 1176.0191324974. The cubic root of 1383021 is about 111.4148102194.

Adding to 1383021 its reverse (1203831), we get a palindrome (2586852).

The spelling of 1383021 in words is "one million, three hundred eighty-three thousand, twenty-one".