7138517 has 6 divisors (see below), whose sum is σ = 7293078. Its totient is φ = 6984744.

The previous prime is 7138513. The next prime is 7138541. The reversal of 7138517 is 7158317.

It can be written as a sum of positive squares in only one way, i.e., 6599761 + 538756 = 2569^2 + 734^2 .

It is not a de Polignac number, because 7138517 - 2² = 7138513 is a prime.

It is a Duffinian number.

Its product of digits (5880) is a multiple of the sum of its prime divisors (420).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19268 + ... + 19634.

It is an arithmetic number, because the mean of its divisors is an integer number (1215513).

Almost surely, 2^7138517 is an apocalyptic number.

It is an amenable number.

7138517 is a deficient number, since it is larger than the sum of its proper divisors (154561).

7138517 is an frugal number, since it uses more digits than its factorization.

7138517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 420 counting only the distinct ones).

The product of its digits is 5880, while the sum is 32.

The square root of 7138517 is about 2671.8003293660. The cubic root of 7138517 is about 192.5466643491.

The spelling of 7138517 in words is "seven million, one hundred thirty-eight thousand, five hundred seventeen".