145705081 has 2 divisors, whose sum is σ = 145705082. Its totient is φ = 145705080.

The previous prime is 145705061. The next prime is 145705093. The reversal of 145705081 is 180507541.

145705081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108993600 + 36711481 = 10440^2 + 6059^2 .

It is a cyclic number.

It is not a de Polignac number, because 145705081 - 2¹⁵ = 145672313 is a prime.

It is a super-2 number, since 2×145705081² = 42459941258433122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145705031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72852540 + 72852541.

It is an arithmetic number, because the mean of its divisors is an integer number (72852541).

Almost surely, 2^145705081 is an apocalyptic number.

It is an amenable number.

145705081 is a deficient number, since it is larger than the sum of its proper divisors (1).

145705081 is an equidigital number, since it uses as much as digits as its factorization.

145705081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 145705081 is about 12070.8359693933. The cubic root of 145705081 is about 526.2089521002.

The spelling of 145705081 in words is "one hundred forty-five million, seven hundred five thousand, eighty-one".