1145728439 has 2 divisors, whose sum is σ = 1145728440. Its totient is φ = 1145728438.

The previous prime is 1145728427. The next prime is 1145728453. The reversal of 1145728439 is 9348275411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1145728439 - 2⁸ = 1145728183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1145728439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145728459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572864219 + 572864220.

It is an arithmetic number, because the mean of its divisors is an integer number (572864220).

Almost surely, 2^1145728439 is an apocalyptic number.

1145728439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145728439 is an equidigital number, since it uses as much as digits as its factorization.

1145728439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 1145728439 is about 33848.6105918692. The cubic root of 1145728439 is about 1046.3907641050.

The spelling of 1145728439 in words is "one billion, one hundred forty-five million, seven hundred twenty-eight thousand, four hundred thirty-nine".