8651881 has 12 divisors (see below), whose sum is σ = 10114308. Its totient is φ = 7379232.

The previous prime is 8651869. The next prime is 8651891. The reversal of 8651881 is 1881568.

It can be written as a sum of positive squares in 2 ways, for example, as 614656 + 8037225 = 784^2 + 2835^2 .

It is not a de Polignac number, because 8651881 - 2¹⁹ = 8127593 is a prime.

It is a super-2 number, since 2×8651881² = 149710089676322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8651881.

It is not an unprimeable number, because it can be changed into a prime (8651891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15255 + ... + 15811.

It is an arithmetic number, because the mean of its divisors is an integer number (842859).

Almost surely, 2^8651881 is an apocalyptic number.

It is an amenable number.

8651881 is a deficient number, since it is larger than the sum of its proper divisors (1462427).

8651881 is a wasteful number, since it uses less digits than its factorization.

8651881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 881 counting only the distinct ones).

The product of its digits is 15360, while the sum is 37.

The square root of 8651881 is about 2941.4079961814. The cubic root of 8651881 is about 205.2911271148.

The spelling of 8651881 in words is "eight million, six hundred fifty-one thousand, eight hundred eighty-one".