8749281 has 8 divisors (see below), whose sum is σ = 11681280. Its totient is φ = 5825072.

The previous prime is 8749243. The next prime is 8749309. The reversal of 8749281 is 1829478.

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 8749281 - 2¹⁸ = 8487137 is a prime.

It is a super-2 number, since 2×8749281² = 153099836033922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8749981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1600 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (1460160).

Almost surely, 2^8749281 is an apocalyptic number.

It is an amenable number.

8749281 is a deficient number, since it is larger than the sum of its proper divisors (2931999).

8749281 is a wasteful number, since it uses less digits than its factorization.

8749281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895.

The product of its digits is 32256, while the sum is 39.

The square root of 8749281 is about 2957.9183558712. The cubic root of 8749281 is about 206.0586206375.

The spelling of 8749281 in words is "eight million, seven hundred forty-nine thousand, two hundred eighty-one".