8623121 has 16 divisors (see below), whose sum is σ = 9752400. Its totient is φ = 7569408.

The previous prime is 8623103. The next prime is 8623123. The reversal of 8623121 is 1213268.

8623121 = T₂₁₈ + T₂₁₉ + ... + T₃₉₅.

It can be written as a sum of positive squares in 8 ways, for example, as 3025 + 8620096 = 55^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 8623121 - 2¹⁴ = 8606737 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8623123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33425 + ... + 33681.

It is an arithmetic number, because the mean of its divisors is an integer number (609525).

Almost surely, 2^8623121 is an apocalyptic number.

It is an amenable number.

8623121 is a deficient number, since it is larger than the sum of its proper divisors (1129279).

8623121 is a wasteful number, since it uses less digits than its factorization.

8623121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388.

The product of its digits is 576, while the sum is 23.

The square root of 8623121 is about 2936.5151114884. The cubic root of 8623121 is about 205.0634029545.

Adding to 8623121 its reverse (1213268), we get a palindrome (9836389).

The spelling of 8623121 in words is "eight million, six hundred twenty-three thousand, one hundred twenty-one".