1343401021 has 4 divisors (see below), whose sum is σ = 1346461600. Its totient is φ = 1340340444.

The previous prime is 1343401009. The next prime is 1343401051. The reversal of 1343401021 is 1201043431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1201043431 = 7 ⋅171577633.

It is a cyclic number.

It is not a de Polignac number, because 1343401021 - 2¹⁵ = 1343368253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1343401021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343401001) 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 3 ways as a sum of consecutive naturals, for example, 1529631 + ... + 1530508.

It is an arithmetic number, because the mean of its divisors is an integer number (336615400).

Almost surely, 2^1343401021 is an apocalyptic number.

It is an amenable number.

1343401021 is a deficient number, since it is larger than the sum of its proper divisors (3060579).

1343401021 is an equidigital number, since it uses as much as digits as its factorization.

1343401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060578.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1343401021 is about 36652.4354033944. The cubic root of 1343401021 is about 1103.4057039652.

Adding to 1343401021 its reverse (1201043431), we get a palindrome (2544444452).

The spelling of 1343401021 in words is "one billion, three hundred forty-three million, four hundred one thousand, twenty-one".