7123138 has 16 divisors (see below), whose sum is σ = 12270240. Its totient is φ = 3067200.

The previous prime is 7123117. The next prime is 7123159. The reversal of 7123138 is 8313217.

It is an interprime number because it is at equal distance from previous prime (7123117) and next prime (7123159).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8103 + ... + 8938.

It is an arithmetic number, because the mean of its divisors is an integer number (766890).

Almost surely, 2^7123138 is an apocalyptic number.

7123138 is a deficient number, since it is larger than the sum of its proper divisors (5147102).

7123138 is a wasteful number, since it uses less digits than its factorization.

7123138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17073.

The product of its digits is 1008, while the sum is 25.

The square root of 7123138 is about 2668.9207556614. The cubic root of 7123138 is about 192.4082927430.

The spelling of 7123138 in words is "seven million, one hundred twenty-three thousand, one hundred thirty-eight".