145117061 has 2 divisors, whose sum is σ = 145117062. Its totient is φ = 145117060.

The previous prime is 145117057. The next prime is 145117067. The reversal of 145117061 is 160711541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144744961 + 372100 = 12031^2 + 610^2 .

It is an emirp because it is prime and its reverse (160711541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145117061 - 2² = 145117057 is a prime.

It is a super-2 number, since 2×145117061² = 42117922786555442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145117061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145117067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72558530 + 72558531.

It is an arithmetic number, because the mean of its divisors is an integer number (72558531).

Almost surely, 2^145117061 is an apocalyptic number.

It is an amenable number.

145117061 is a deficient number, since it is larger than the sum of its proper divisors (1).

145117061 is an equidigital number, since it uses as much as digits as its factorization.

145117061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 145117061 is about 12046.4542916163. The cubic root of 145117061 is about 525.5001262899.

The spelling of 145117061 in words is "one hundred forty-five million, one hundred seventeen thousand, sixty-one".