7081138 has 8 divisors (see below), whose sum is σ = 10668780. Its totient is φ = 3524880.

The previous prime is 7081117. The next prime is 7081157. The reversal of 7081138 is 8311807.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7006609 + 74529 = 2647^2 + 273^2 .

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

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, 7273 + ... + 8188.

Almost surely, 2^7081138 is an apocalyptic number.

7081138 is a deficient number, since it is larger than the sum of its proper divisors (3587642).

7081138 is a wasteful number, since it uses less digits than its factorization.

7081138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15692.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 7081138 is about 2661.0407738327. The cubic root of 7081138 is about 192.0293828006.

The spelling of 7081138 in words is "seven million, eighty-one thousand, one hundred thirty-eight".