7138 has 8 divisors (see below), whose sum is σ = 11088. Its totient is φ = 3444.

The previous prime is 7129. The next prime is 7151. The reversal of 7138 is 8317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45 + ... + 127.

It is an arithmetic number, because the mean of its divisors is an integer number (1386).

2⁷¹³⁸ is an apocalyptic number.

7138 is a deficient number, since it is larger than the sum of its proper divisors (3950).

7138 is a wasteful number, since it uses less digits than its factorization.

7138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128.

The product of its digits is 168, while the sum is 19.

The square root of 7138 is about 84.4866853415. The cubic root of 7138 is about 19.2542015903.

The spelling of 7138 in words is "seven thousand, one hundred thirty-eight".