8961281 has 4 divisors (see below), whose sum is σ = 10241472. Its totient is φ = 7681092.

The previous prime is 8961269. The next prime is 8961299. The reversal of 8961281 is 1821698.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1821698 = 2 ⋅910849.

It is a cyclic number.

It is not a de Polignac number, because 8961281 - 2¹⁰ = 8960257 is a prime.

It is a super-2 number, since 2×8961281² = 160609114321922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8961221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640085 + ... + 640098.

It is an arithmetic number, because the mean of its divisors is an integer number (2560368).

Almost surely, 2^8961281 is an apocalyptic number.

It is an amenable number.

8961281 is a deficient number, since it is larger than the sum of its proper divisors (1280191).

8961281 is a wasteful number, since it uses less digits than its factorization.

8961281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280190.

The product of its digits is 6912, while the sum is 35.

The square root of 8961281 is about 2993.5398778035. The cubic root of 8961281 is about 207.7096617943.

The spelling of 8961281 in words is "eight million, nine hundred sixty-one thousand, two hundred eighty-one".