7139705 has 8 divisors (see below), whose sum is σ = 8799432. Its totient is φ = 5557248.

The previous prime is 7139701. The next prime is 7139731. The reversal of 7139705 is 5079317.

It can be written as a sum of positive squares in 4 ways, for example, as 2598544 + 4541161 = 1612^2 + 2131^2 .

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 7139705 - 2² = 7139701 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 (7139701) 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, 19112 + ... + 19481.

It is an arithmetic number, because the mean of its divisors is an integer number (1099929).

Almost surely, 2^7139705 is an apocalyptic number.

It is an amenable number.

7139705 is a deficient number, since it is larger than the sum of its proper divisors (1659727).

7139705 is a wasteful number, since it uses less digits than its factorization.

7139705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38635.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 7139705 is about 2672.0226421196. The cubic root of 7139705 is about 192.5573450338.

The spelling of 7139705 in words is "seven million, one hundred thirty-nine thousand, seven hundred five".