7138705 has 16 divisors (see below), whose sum is σ = 9959040. Its totient is φ = 4810752.

The previous prime is 7138697. The next prime is 7138723. The reversal of 7138705 is 5078317.

It is a cyclic number.

It is not a de Polignac number, because 7138705 - 2³ = 7138697 is a prime.

It is a super-2 number, since 2×7138705² = 101922218154050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 337 + ... + 3793.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^7138705 is an apocalyptic number.

It is an amenable number.

7138705 is a deficient number, since it is larger than the sum of its proper divisors (2820335).

7138705 is a wasteful number, since it uses less digits than its factorization.

7138705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 7138705 is about 2671.8355114041. The cubic root of 7138705 is about 192.5483546374.

The spelling of 7138705 in words is "seven million, one hundred thirty-eight thousand, seven hundred five".