145206517 has 2 divisors, whose sum is σ = 145206518. Its totient is φ = 145206516.

The previous prime is 145206499. The next prime is 145206527. The reversal of 145206517 is 715602541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82337476 + 62869041 = 9074^2 + 7929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145206517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145206527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72603258 + 72603259.

It is an arithmetic number, because the mean of its divisors is an integer number (72603259).

Almost surely, 2^145206517 is an apocalyptic number.

It is an amenable number.

145206517 is a deficient number, since it is larger than the sum of its proper divisors (1).

145206517 is an equidigital number, since it uses as much as digits as its factorization.

145206517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 145206517 is about 12050.1666793451. The cubic root of 145206517 is about 525.6080839227.

The spelling of 145206517 in words is "one hundred forty-five million, two hundred six thousand, five hundred seventeen".