1321072326 has 24 divisors (see below), whose sum is σ = 3271227024. Its totient is φ = 377449200.

The previous prime is 1321072307. The next prime is 1321072339. The reversal of 1321072326 is 6232701231.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321072326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5242225 + ... + 5242476.

It is an arithmetic number, because the mean of its divisors is an integer number (136301126).

Almost surely, 2^1321072326 is an apocalyptic number.

1321072326 is an abundant number, since it is smaller than the sum of its proper divisors (1950154698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321072326 is a wasteful number, since it uses less digits than its factorization.

1321072326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10484716 (or 10484713 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1321072326 is about 36346.5586541560. The cubic root of 1321072326 is about 1097.2582755745.

Adding to 1321072326 its reverse (6232701231), we get a palindrome (7553773557).

The spelling of 1321072326 in words is "one billion, three hundred twenty-one million, seventy-two thousand, three hundred twenty-six".