9251281 has 16 divisors (see below), whose sum is σ = 10816848. Its totient is φ = 7833600.

The previous prime is 9251279. The next prime is 9251323. The reversal of 9251281 is 1821529.

It can be written as a sum of positive squares in 8 ways, for example, as 748225 + 8503056 = 865^2 + 2916^2 .

It is not a de Polignac number, because 9251281 - 2¹ = 9251279 is a prime.

It is a super-2 number, since 2×9251281² = 171172400281922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9251201) 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 15 ways as a sum of consecutive naturals, for example, 8551 + ... + 9571.

It is an arithmetic number, because the mean of its divisors is an integer number (676053).

Almost surely, 2^9251281 is an apocalyptic number.

It is an amenable number.

9251281 is a deficient number, since it is larger than the sum of its proper divisors (1565567).

9251281 is a wasteful number, since it uses less digits than its factorization.

9251281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092.

The product of its digits is 1440, while the sum is 28.

The square root of 9251281 is about 3041.5918529612. The cubic root of 9251281 is about 209.9265124575.

The spelling of 9251281 in words is "nine million, two hundred fifty-one thousand, two hundred eighty-one".