7138507 has 4 divisors (see below), whose sum is σ = 7151256. Its totient is φ = 7125760.

The previous prime is 7138489. The next prime is 7138513. The reversal of 7138507 is 7058317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7058317 = 7 ⋅1008331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7138507 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7138577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5494 + ... + 6667.

It is an arithmetic number, because the mean of its divisors is an integer number (1787814).

Almost surely, 2^7138507 is an apocalyptic number.

7138507 is a deficient number, since it is larger than the sum of its proper divisors (12749).

7138507 is a wasteful number, since it uses less digits than its factorization.

7138507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12748.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 7138507 is about 2671.7984579680. The cubic root of 7138507 is about 192.5465744393.

The spelling of 7138507 in words is "seven million, one hundred thirty-eight thousand, five hundred seven".