1343821 has 4 divisors (see below), whose sum is σ = 1402272. Its totient is φ = 1285372.

The previous prime is 1343801. The next prime is 1343863. The reversal of 1343821 is 1283431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1343821 - 2⁵ = 1343789 is a prime.

It is a super-4 number, since 4×1343821⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1343792 and 1343801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343801) 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, 29191 + ... + 29236.

It is an arithmetic number, because the mean of its divisors is an integer number (350568).

2^1343821 is an apocalyptic number.

It is an amenable number.

1343821 is a deficient number, since it is larger than the sum of its proper divisors (58451).

1343821 is an equidigital number, since it uses as much as digits as its factorization.

1343821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58450.

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

The square root of 1343821 is about 1159.2329360400. The cubic root of 1343821 is about 110.3520675577.

It can be divided in two parts, 13 and 43821, that added together give a palindrome (43834).

The spelling of 1343821 in words is "one million, three hundred forty-three thousand, eight hundred twenty-one".