145273 has 4 divisors (see below), whose sum is σ = 148068. Its totient is φ = 142480.

The previous prime is 145267. The next prime is 145283. The reversal of 145273 is 372541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372541 = 13 ⋅28657.

It can be written as a sum of positive squares in 2 ways, for example, as 73984 + 71289 = 272^2 + 267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145273 is a prime.

It is a super-2 number, since 2×145273² = 42208489058, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (145213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318 + ... + 1423.

It is an arithmetic number, because the mean of its divisors is an integer number (37017).

145273 is a Friedman number, since it can be written as 2741*53, using all its digits and the basic arithmetic operations.

2¹⁴⁵²⁷³ is an apocalyptic number.

It is an amenable number.

145273 is a deficient number, since it is larger than the sum of its proper divisors (2795).

145273 is an equidigital number, since it uses as much as digits as its factorization.

145273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794.

The product of its digits is 840, while the sum is 22.

The square root of 145273 is about 381.1469532870. The cubic root of 145273 is about 52.5688288474.

The spelling of 145273 in words is "one hundred forty-five thousand, two hundred seventy-three".