1383421 has 4 divisors (see below), whose sum is σ = 1489852. Its totient is φ = 1276992.

The previous prime is 1383401. The next prime is 1383433. The reversal of 1383421 is 1243831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243831 = 97 ⋅12823.

It can be written as a sum of positive squares in 2 ways, for example, as 617796 + 765625 = 786^2 + 875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1383421 is a prime.

1383421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1383392 and 1383401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383401) 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, 53196 + ... + 53221.

It is an arithmetic number, because the mean of its divisors is an integer number (372463).

2^1383421 is an apocalyptic number.

It is an amenable number.

1383421 is a deficient number, since it is larger than the sum of its proper divisors (106431).

1383421 is a wasteful number, since it uses less digits than its factorization.

1383421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106430.

The product of its digits is 576, while the sum is 22.

The square root of 1383421 is about 1176.1891854630. The cubic root of 1383421 is about 111.4255503861.

The spelling of 1383421 in words is "one million, three hundred eighty-three thousand, four hundred twenty-one".