1155247439 has 2 divisors, whose sum is σ = 1155247440. Its totient is φ = 1155247438.

The previous prime is 1155247391. The next prime is 1155247459. The reversal of 1155247439 is 9347425511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155247439 - 2¹⁶ = 1155181903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155247396 and 1155247405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155247459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577623719 + 577623720.

It is an arithmetic number, because the mean of its divisors is an integer number (577623720).

Almost surely, 2^1155247439 is an apocalyptic number.

1155247439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155247439 is an equidigital number, since it uses as much as digits as its factorization.

1155247439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 1155247439 is about 33988.9311247059. The cubic root of 1155247439 is about 1049.2806680093.

The spelling of 1155247439 in words is "one billion, one hundred fifty-five million, two hundred forty-seven thousand, four hundred thirty-nine".