7138855 has 12 divisors (see below), whose sum is σ = 8958600. Its totient is φ = 5460752.

The previous prime is 7138853. The next prime is 7138867. The reversal of 7138855 is 5588317.

It is not a de Polignac number, because 7138855 - 2¹ = 7138853 is a prime.

It is a super-2 number, since 2×7138855² = 101926501422050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1296 + ... + 3994.

It is an arithmetic number, because the mean of its divisors is an integer number (746550).

Almost surely, 2^7138855 is an apocalyptic number.

7138855 is a deficient number, since it is larger than the sum of its proper divisors (1819745).

7138855 is a wasteful number, since it uses less digits than its factorization.

7138855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750 (or 2727 counting only the distinct ones).

The product of its digits is 33600, while the sum is 37.

The square root of 7138855 is about 2671.8635818469. The cubic root of 7138855 is about 192.5497032504.

The spelling of 7138855 in words is "seven million, one hundred thirty-eight thousand, eight hundred fifty-five".