8727121 has 8 divisors (see below), whose sum is σ = 9422504. Its totient is φ = 8035200.

The previous prime is 8727119. The next prime is 8727149. The reversal of 8727121 is 1217278.

It can be written as a sum of positive squares in 4 ways, for example, as 83521 + 8643600 = 289^2 + 2940^2 .

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

It is a 2-Lehmer number, since φ(8727121) divides (8727121-1)².

It is a cyclic number.

It is not a de Polignac number, because 8727121 - 2¹ = 8727119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8727121.

It is not an unprimeable number, because it can be changed into a prime (8727161) 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, 7255 + ... + 8371.

It is an arithmetic number, because the mean of its divisors is an integer number (1177813).

Almost surely, 2^8727121 is an apocalyptic number.

It is an amenable number.

8727121 is a deficient number, since it is larger than the sum of its proper divisors (695383).

8727121 is a wasteful number, since it uses less digits than its factorization.

8727121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731.

The product of its digits is 1568, while the sum is 28.

The square root of 8727121 is about 2954.1701034301. The cubic root of 8727121 is about 205.8845065369.

The spelling of 8727121 in words is "eight million, seven hundred twenty-seven thousand, one hundred twenty-one".