145000861 has 2 divisors, whose sum is σ = 145000862. Its totient is φ = 145000860.

The previous prime is 145000831. The next prime is 145000873. The reversal of 145000861 is 168000541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 46376100 = 9931^2 + 6810^2 .

It is an emirp because it is prime and its reverse (168000541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145000861 - 2²⁵ = 111446429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145000831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72500430 + 72500431.

It is an arithmetic number, because the mean of its divisors is an integer number (72500431).

Almost surely, 2^145000861 is an apocalyptic number.

It is an amenable number.

145000861 is a deficient number, since it is larger than the sum of its proper divisors (1).

145000861 is an equidigital number, since it uses as much as digits as its factorization.

145000861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 145000861 is about 12041.6303298183. The cubic root of 145000861 is about 525.3598270953.

The spelling of 145000861 in words is "one hundred forty-five million, eight hundred sixty-one", and thus it is an aban number.