8723145 has 16 divisors (see below), whose sum is σ = 13993920. Its totient is φ = 4640064.

The previous prime is 8723137. The next prime is 8723149. The reversal of 8723145 is 5413278.

It is not a de Polignac number, because 8723145 - 2³ = 8723137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8723149) 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, 9726 + ... + 10584.

It is an arithmetic number, because the mean of its divisors is an integer number (874620).

Almost surely, 2^8723145 is an apocalyptic number.

It is an amenable number.

8723145 is a deficient number, since it is larger than the sum of its proper divisors (5270775).

8723145 is a wasteful number, since it uses less digits than its factorization.

8723145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its digits is 6720, while the sum is 30.

The square root of 8723145 is about 2953.4970797345. The cubic root of 8723145 is about 205.8532353940.

It can be divided in two parts, 87 and 23145, that added together give a palindrome (23232).

The spelling of 8723145 in words is "eight million, seven hundred twenty-three thousand, one hundred forty-five".