9145281 has 8 divisors (see below), whose sum is σ = 12210784. Its totient is φ = 6088320.

The previous prime is 9145259. The next prime is 9145291. The reversal of 9145281 is 1825419.

It is a happy number.

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

It is not a de Polignac number, because 9145281 - 2⁵ = 9145249 is a prime.

It is a super-2 number, since 2×9145281² = 167272329137922, which contains 22 as substring.

It is a Duffinian number.

9145281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9145291) 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 7 ways as a sum of consecutive naturals, for example, 1041 + ... + 4401.

It is an arithmetic number, because the mean of its divisors is an integer number (1526348).

Almost surely, 2^9145281 is an apocalyptic number.

It is an amenable number.

9145281 is a deficient number, since it is larger than the sum of its proper divisors (3065503).

9145281 is a wasteful number, since it uses less digits than its factorization.

9145281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271.

The product of its digits is 2880, while the sum is 30.

The square root of 9145281 is about 3024.1165652137. The cubic root of 9145281 is about 209.1216602019.

The spelling of 9145281 in words is "nine million, one hundred forty-five thousand, two hundred eighty-one".