1321454539 has 2 divisors, whose sum is σ = 1321454540. Its totient is φ = 1321454538.

The previous prime is 1321454531. The next prime is 1321454549. The reversal of 1321454539 is 9354541231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321454539 - 2³ = 1321454531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321454498 and 1321454507.

It is not a weakly prime, because it can be changed into another prime (1321454531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660727269 + 660727270.

It is an arithmetic number, because the mean of its divisors is an integer number (660727270).

Almost surely, 2^1321454539 is an apocalyptic number.

1321454539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321454539 is an equidigital number, since it uses as much as digits as its factorization.

1321454539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 1321454539 is about 36351.8161719604. The cubic root of 1321454539 is about 1097.3640850571.

The spelling of 1321454539 in words is "one billion, three hundred twenty-one million, four hundred fifty-four thousand, five hundred thirty-nine".