7125079138 has 16 divisors (see below), whose sum is σ = 11056704120. Its totient is φ = 3441232000.

The previous prime is 7125079067. The next prime is 7125079139. The reversal of 7125079138 is 8319705217.

It can be written as a sum of positive squares in 4 ways, for example, as 5084117809 + 2040961329 = 71303^2 + 45177^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7125079094 and 7125079103.

It is not an unprimeable number, because it can be changed into a prime (7125079139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421873 + ... + 438436.

Almost surely, 2^7125079138 is an apocalyptic number.

7125079138 is a deficient number, since it is larger than the sum of its proper divisors (3931624982).

7125079138 is a wasteful number, since it uses less digits than its factorization.

7125079138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860453.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 7125079138 is about 84410.1838524239. The cubic root of 7125079138 is about 1924.2576898853.

It can be divided in two parts, 7125079 and 138, that added together give a palindrome (7125217).

The spelling of 7125079138 in words is "seven billion, one hundred twenty-five million, seventy-nine thousand, one hundred thirty-eight".