145281 has 8 divisors (see below), whose sum is σ = 196480. Its totient is φ = 95472.

The previous prime is 145267. The next prime is 145283. The reversal of 145281 is 182541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145281 - 2¹³ = 137089 is a prime.

It is a super-2 number, since 2×145281² = 42213137922, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145281.

It is not an unprimeable number, because it can be changed into a prime (145283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70 + ... + 543.

It is an arithmetic number, because the mean of its divisors is an integer number (24560).

2¹⁴⁵²⁸¹ is an apocalyptic number.

It is an amenable number.

145281 is a deficient number, since it is larger than the sum of its proper divisors (51199).

145281 is an equidigital number, since it uses as much as digits as its factorization.

145281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695.

The product of its digits is 320, while the sum is 21.

The square root of 145281 is about 381.1574477824. The cubic root of 145281 is about 52.5697937959.

The spelling of 145281 in words is "one hundred forty-five thousand, two hundred eighty-one".