145745729 has 2 divisors, whose sum is σ = 145745730. Its totient is φ = 145745728.

The previous prime is 145745711. The next prime is 145745749. The reversal of 145745729 is 927547541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 19228225 = 11248^2 + 4385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145745729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145745729.

It is not a weakly prime, because it can be changed into another prime (145745749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72872864 + 72872865.

It is an arithmetic number, because the mean of its divisors is an integer number (72872865).

Almost surely, 2^145745729 is an apocalyptic number.

It is an amenable number.

145745729 is a deficient number, since it is larger than the sum of its proper divisors (1).

145745729 is an equidigital number, since it uses as much as digits as its factorization.

145745729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 44.

The square root of 145745729 is about 12072.5195796072. The cubic root of 145745729 is about 526.2578805078.

The spelling of 145745729 in words is "one hundred forty-five million, seven hundred forty-five thousand, seven hundred twenty-nine".