7138565 has 12 divisors (see below), whose sum is σ = 9965196. Its totient is φ = 4894848.

The previous prime is 7138561. The next prime is 7138577. The reversal of 7138565 is 5658317.

7138565 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4831204 + 2307361 = 2198^2 + 1519^2 .

It is not a de Polignac number, because 7138565 - 2² = 7138561 is a prime.

It is a super-2 number, since 2×7138565² = 101918220518450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14324 + ... + 14813.

It is an arithmetic number, because the mean of its divisors is an integer number (830433).

Almost surely, 2^7138565 is an apocalyptic number.

It is an amenable number.

7138565 is a deficient number, since it is larger than the sum of its proper divisors (2826631).

7138565 is a wasteful number, since it uses less digits than its factorization.

7138565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29156 (or 29149 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 7138565 is about 2671.8093120580. The cubic root of 7138565 is about 192.5470959149.

The spelling of 7138565 in words is "seven million, one hundred thirty-eight thousand, five hundred sixty-five".