1323262421 has 4 divisors (see below), whose sum is σ = 1425051852. Its totient is φ = 1221472992.

The previous prime is 1323262399. The next prime is 1323262481. The reversal of 1323262421 is 1242623231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242623231 = 23 ⋅54027097.

It can be written as a sum of positive squares in 2 ways, for example, as 621754225 + 701508196 = 24935^2 + 26486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323262421 - 2²⁶ = 1256153557 is a prime.

It is a super-3 number, since 3×1323262421³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323262481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50894696 + ... + 50894721.

It is an arithmetic number, because the mean of its divisors is an integer number (356262963).

Almost surely, 2^1323262421 is an apocalyptic number.

It is an amenable number.

1323262421 is a deficient number, since it is larger than the sum of its proper divisors (101789431).

1323262421 is a wasteful number, since it uses less digits than its factorization.

1323262421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101789430.

The product of its digits is 3456, while the sum is 26.

The square root of 1323262421 is about 36376.6741332959. The cubic root of 1323262421 is about 1097.8642916297.

Adding to 1323262421 its reverse (1242623231), we get a palindrome (2565885652).

The spelling of 1323262421 in words is "one billion, three hundred twenty-three million, two hundred sixty-two thousand, four hundred twenty-one".