90271281 has 8 divisors (see below), whose sum is σ = 120575520. Its totient is φ = 60073952.

The previous prime is 90271271. The next prime is 90271283. The reversal of 90271281 is 18217209.

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

It is a cyclic number.

It is not a de Polignac number, because 90271281 - 2¹⁷ = 90140209 is a prime.

It is a super-2 number, since 2×90271281² = 16297808346761922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90271283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24735 + ... + 28148.

It is an arithmetic number, because the mean of its divisors is an integer number (15071940).

Almost surely, 2^90271281 is an apocalyptic number.

It is an amenable number.

90271281 is a deficient number, since it is larger than the sum of its proper divisors (30304239).

90271281 is a wasteful number, since it uses less digits than its factorization.

90271281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53455.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 90271281 is about 9501.1199866121. The cubic root of 90271281 is about 448.5902896611.

The spelling of 90271281 in words is "ninety million, two hundred seventy-one thousand, two hundred eighty-one".