8621145 has 24 divisors (see below), whose sum is σ = 16093896. Its totient is φ = 4243968.

The previous prime is 8621143. The next prime is 8621147. The reversal of 8621145 is 5411268.

It is an interprime number because it is at equal distance from previous prime (8621143) and next prime (8621147).

It can be written as a sum of positive squares in 4 ways, for example, as 853776 + 7767369 = 924^2 + 2787^2 .

It is not a de Polignac number, because 8621145 - 2¹ = 8621143 is a prime.

It is a super-2 number, since 2×8621145² = 148648282222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8621143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6784 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (670579).

Almost surely, 2^8621145 is an apocalyptic number.

It is an amenable number.

8621145 is a deficient number, since it is larger than the sum of its proper divisors (7472751).

8621145 is a wasteful number, since it uses less digits than its factorization.

8621145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14761 (or 14758 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 8621145 is about 2936.1786389796. The cubic root of 8621145 is about 205.0477382379.

The spelling of 8621145 in words is "eight million, six hundred twenty-one thousand, one hundred forty-five".