7139105 has 4 divisors (see below), whose sum is σ = 8566932. Its totient is φ = 5711280.

The previous prime is 7139101. The next prime is 7139123. The reversal of 7139105 is 5019317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5019317 = 401 ⋅12517.

It can be written as a sum of positive squares in 2 ways, for example, as 1682209 + 5456896 = 1297^2 + 2336^2 .

It is not a de Polignac number, because 7139105 - 2² = 7139101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7139101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713906 + ... + 713915.

It is an arithmetic number, because the mean of its divisors is an integer number (2141733).

Almost surely, 2^7139105 is an apocalyptic number.

It is an amenable number.

7139105 is a deficient number, since it is larger than the sum of its proper divisors (1427827).

7139105 is a wasteful number, since it uses less digits than its factorization.

7139105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427826.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 7139105 is about 2671.9103652630. The cubic root of 7139105 is about 192.5519508967.

The spelling of 7139105 in words is "seven million, one hundred thirty-nine thousand, one hundred five".