1344123421 has 2 divisors, whose sum is σ = 1344123422. Its totient is φ = 1344123420.

The previous prime is 1344123397. The next prime is 1344123439. The reversal of 1344123421 is 1243214431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 740438521 + 603684900 = 27211^2 + 24570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344123421 - 2²¹ = 1342026269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344123461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672061710 + 672061711.

It is an arithmetic number, because the mean of its divisors is an integer number (672061711).

Almost surely, 2^1344123421 is an apocalyptic number.

It is an amenable number.

1344123421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344123421 is an equidigital number, since it uses as much as digits as its factorization.

1344123421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 1344123421 is about 36662.2888128933. The cubic root of 1344123421 is about 1103.6034501912.

Adding to 1344123421 its reverse (1243214431), we get a palindrome (2587337852).

The spelling of 1344123421 in words is "one billion, three hundred forty-four million, one hundred twenty-three thousand, four hundred twenty-one".