145000081 has 2 divisors, whose sum is σ = 145000082. Its totient is φ = 145000080.

The previous prime is 145000069. The next prime is 145000099. The reversal of 145000081 is 180000541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144985681 + 14400 = 12041^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 145000081 - 2⁵ = 145000049 is a prime.

It is a super-2 number, since 2×145000081² = 42050046980013122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145000061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72500040 + 72500041.

It is an arithmetic number, because the mean of its divisors is an integer number (72500041).

Almost surely, 2^145000081 is an apocalyptic number.

It is an amenable number.

145000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

145000081 is an equidigital number, since it uses as much as digits as its factorization.

145000081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 145000081 is about 12041.5979421338. The cubic root of 145000081 is about 525.3588850747.

The spelling of 145000081 in words is "one hundred forty-five million, eighty-one", and thus it is an aban number.