145145717 has 2 divisors, whose sum is σ = 145145718. Its totient is φ = 145145716.

The previous prime is 145145713. The next prime is 145145837. The reversal of 145145717 is 717541541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145106116 + 39601 = 12046^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 145145717 - 2² = 145145713 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 (145145713) 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, 72572858 + 72572859.

It is an arithmetic number, because the mean of its divisors is an integer number (72572859).

Almost surely, 2^145145717 is an apocalyptic number.

It is an amenable number.

145145717 is a deficient number, since it is larger than the sum of its proper divisors (1).

145145717 is an equidigital number, since it uses as much as digits as its factorization.

145145717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19600, while the sum is 35.

The square root of 145145717 is about 12047.6436285275. The cubic root of 145145717 is about 525.5347138622.

The spelling of 145145717 in words is "one hundred forty-five million, one hundred forty-five thousand, seven hundred seventeen".