145081 has 4 divisors (see below), whose sum is σ = 147600. Its totient is φ = 142564.

The previous prime is 145069. The next prime is 145091. The reversal of 145081 is 180541.

It is the 156-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145081 - 2⁹ = 144569 is a prime.

It is a super-2 number, since 2×145081² = 42096993122, which contains 22 as substring.

It is a Duffinian number.

145081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (145021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171 + ... + 1288.

It is an arithmetic number, because the mean of its divisors is an integer number (36900).

2¹⁴⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

145081 is a deficient number, since it is larger than the sum of its proper divisors (2519).

145081 is an equidigital number, since it uses as much as digits as its factorization.

145081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518.

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

The square root of 145081 is about 380.8949986545. The cubic root of 145081 is about 52.5456594469.

The spelling of 145081 in words is "one hundred forty-five thousand, eighty-one".