8121761 has 8 divisors (see below), whose sum is σ = 8354304. Its totient is φ = 7892640.

The previous prime is 8121749. The next prime is 8121793. The reversal of 8121761 is 1671218.

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 8121761 - 2⁶ = 8121697 is a prime.

It is a super-2 number, since 2×8121761² = 131926003482242, which contains 22 as substring.

It is an Ulam number.

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 8121761.

It is not an unprimeable number, because it can be changed into a prime (8127761) 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, 4400 + ... + 5966.

It is an arithmetic number, because the mean of its divisors is an integer number (1044288).

Almost surely, 2^8121761 is an apocalyptic number.

It is an amenable number.

8121761 is a deficient number, since it is larger than the sum of its proper divisors (232543).

8121761 is a wasteful number, since it uses less digits than its factorization.

8121761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711.

The product of its digits is 672, while the sum is 26.

The square root of 8121761 is about 2849.8703479281. The cubic root of 8121761 is about 201.0095702645.

Adding to 8121761 its reverse (1671218), we get a palindrome (9792979).

The spelling of 8121761 in words is "eight million, one hundred twenty-one thousand, seven hundred sixty-one".