8138745 has 48 divisors (see below), whose sum is σ = 15361920. Its totient is φ = 4087584.

The previous prime is 8138743. The next prime is 8138747. The reversal of 8138745 is 5478318.

It is an interprime number because it is at equal distance from previous prime (8138743) and next prime (8138747).

It is not a de Polignac number, because 8138745 - 2¹ = 8138743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8138743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48652 + ... + 48818.

It is an arithmetic number, because the mean of its divisors is an integer number (320040).

Almost surely, 2^8138745 is an apocalyptic number.

It is an amenable number.

8138745 is a deficient number, since it is larger than the sum of its proper divisors (7223175).

8138745 is a wasteful number, since it uses less digits than its factorization.

8138745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 194 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 8138745 is about 2852.8485764232. The cubic root of 8138745 is about 201.1495879112.

The spelling of 8138745 in words is "eight million, one hundred thirty-eight thousand, seven hundred forty-five".