9001281 has 16 divisors (see below), whose sum is σ = 12513600. Its totient is φ = 5748288.

The previous prime is 9001277. The next prime is 9001283. The reversal of 9001281 is 1821009.

It is not a de Polignac number, because 9001281 - 2² = 9001277 is a prime.

It is a super-2 number, since 2×9001281² = 162046119281922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9001283) 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, 13330 + ... + 13988.

It is an arithmetic number, because the mean of its divisors is an integer number (782100).

Almost surely, 2^9001281 is an apocalyptic number.

It is an amenable number.

9001281 is a deficient number, since it is larger than the sum of its proper divisors (3512319).

9001281 is a wasteful number, since it uses less digits than its factorization.

9001281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 9001281 is about 3000.2134924035. The cubic root of 9001281 is about 208.0182506791.

The spelling of 9001281 in words is "nine million, one thousand, two hundred eighty-one".