7138155 has 8 divisors (see below), whose sum is σ = 11421072. Its totient is φ = 3807008.

The previous prime is 7138123. The next prime is 7138169. The reversal of 7138155 is 5518317.

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

It is a cyclic number.

It is not a de Polignac number, because 7138155 - 2⁵ = 7138123 is a prime.

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, 237924 + ... + 237953.

It is an arithmetic number, because the mean of its divisors is an integer number (1427634).

Almost surely, 2^7138155 is an apocalyptic number.

7138155 is a deficient number, since it is larger than the sum of its proper divisors (4282917).

7138155 is a wasteful number, since it uses less digits than its factorization.

7138155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475885.

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

The square root of 7138155 is about 2671.7325839238. The cubic root of 7138155 is about 192.5434095614.

It can be divided in two parts, 71 and 38155, that added together give a triangular number (38226 = T₂₇₆).

The spelling of 7138155 in words is "seven million, one hundred thirty-eight thousand, one hundred fifty-five".