145645517 has 2 divisors, whose sum is σ = 145645518. Its totient is φ = 145645516.

The previous prime is 145645501. The next prime is 145645547. The reversal of 145645517 is 715546541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144696841 + 948676 = 12029^2 + 974^2 .

It is a cyclic number.

It is not a de Polignac number, because 145645517 - 2⁴ = 145645501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145645547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72822758 + 72822759.

It is an arithmetic number, because the mean of its divisors is an integer number (72822759).

Almost surely, 2^145645517 is an apocalyptic number.

It is an amenable number.

145645517 is a deficient number, since it is larger than the sum of its proper divisors (1).

145645517 is an equidigital number, since it uses as much as digits as its factorization.

145645517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

The square root of 145645517 is about 12068.3684481375. The cubic root of 145645517 is about 526.1372378727.

The spelling of 145645517 in words is "one hundred forty-five million, six hundred forty-five thousand, five hundred seventeen".