145271 has 4 divisors (see below), whose sum is σ = 166032. Its totient is φ = 124512.

The previous prime is 145267. The next prime is 145283. The reversal of 145271 is 172541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145271 - 2² = 145267 is a prime.

It is a super-2 number, since 2×145271² = 42207326882, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145471) 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, 10370 + ... + 10383.

It is an arithmetic number, because the mean of its divisors is an integer number (41508).

2¹⁴⁵²⁷¹ is an apocalyptic number.

145271 is a deficient number, since it is larger than the sum of its proper divisors (20761).

145271 is an equidigital number, since it uses as much as digits as its factorization.

145271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20760.

The product of its digits is 280, while the sum is 20.

The square root of 145271 is about 381.1443296181. The cubic root of 145271 is about 52.5685876047.

Subtracting from 145271 its product of digits (280), we obtain a triangular number (144991 = T₅₃₈).

The spelling of 145271 in words is "one hundred forty-five thousand, two hundred seventy-one".