145455517 has 2 divisors, whose sum is σ = 145455518. Its totient is φ = 145455516.

The previous prime is 145455463. The next prime is 145455523. The reversal of 145455517 is 715554541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84162276 + 61293241 = 9174^2 + 7829^2 .

It is a cyclic number.

It is not a de Polignac number, because 145455517 - 2¹⁹ = 144931229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145456517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72727758 + 72727759.

It is an arithmetic number, because the mean of its divisors is an integer number (72727759).

Almost surely, 2^145455517 is an apocalyptic number.

It is an amenable number.

145455517 is a deficient number, since it is larger than the sum of its proper divisors (1).

145455517 is an equidigital number, since it uses as much as digits as its factorization.

145455517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70000, while the sum is 37.

The square root of 145455517 is about 12060.4940611900. The cubic root of 145455517 is about 525.9083497737.

The spelling of 145455517 in words is "one hundred forty-five million, four hundred fifty-five thousand, five hundred seventeen".