7145281 has 16 divisors (see below), whose sum is σ = 8688960. Its totient is φ = 5785920.

The previous prime is 7145251. The next prime is 7145291. The reversal of 7145281 is 1825417.

It is a cyclic number.

It is not a de Polignac number, because 7145281 - 2⁷ = 7145153 is a prime.

It is a super-2 number, since 2×7145281² = 102110081137922, which contains 22 as substring.

It is a Duffinian number.

7145281 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7145231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3286 + ... + 5008.

It is an arithmetic number, because the mean of its divisors is an integer number (543060).

Almost surely, 2^7145281 is an apocalyptic number.

It is an amenable number.

7145281 is a deficient number, since it is larger than the sum of its proper divisors (1543679).

7145281 is a wasteful number, since it uses less digits than its factorization.

7145281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776.

The product of its digits is 2240, while the sum is 28.

The square root of 7145281 is about 2673.0658428105. The cubic root of 7145281 is about 192.6074600999.

It can be divided in two parts, 714 and 5281, that added together give a palindrome (5995).

The spelling of 7145281 in words is "seven million, one hundred forty-five thousand, two hundred eighty-one".