7155138 has 16 divisors (see below), whose sum is σ = 14341536. Its totient is φ = 2379840.

The previous prime is 7155121. The next prime is 7155149. The reversal of 7155138 is 8315517.

7155138 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×7155138³ (a number of 22 digits) contains 333 as substring.

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, 2553 + ... + 4563.

It is an arithmetic number, because the mean of its divisors is an integer number (896346).

Almost surely, 2^7155138 is an apocalyptic number.

7155138 is an abundant number, since it is smaller than the sum of its proper divisors (7186398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7155138 is a wasteful number, since it uses less digits than its factorization.

7155138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609.

The product of its digits is 4200, while the sum is 30.

The square root of 7155138 is about 2674.9089704138. The cubic root of 7155138 is about 192.6959874970.

The spelling of 7155138 in words is "seven million, one hundred fifty-five thousand, one hundred thirty-eight".