7427705 has 4 divisors (see below), whose sum is σ = 8913252. Its totient is φ = 5942160.

The previous prime is 7427701. The next prime is 7427731. The reversal of 7427705 is 5077247.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5077247 = 7 ⋅725321.

It can be written as a sum of positive squares in 2 ways, for example, as 3523129 + 3904576 = 1877^2 + 1976^2 .

It is not a de Polignac number, because 7427705 - 2² = 7427701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7427701) 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, 742766 + ... + 742775.

It is an arithmetic number, because the mean of its divisors is an integer number (2228313).

Almost surely, 2^7427705 is an apocalyptic number.

It is an amenable number.

7427705 is a deficient number, since it is larger than the sum of its proper divisors (1485547).

7427705 is a wasteful number, since it uses less digits than its factorization.

7427705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485546.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 7427705 is about 2725.3816246537. The cubic root of 7427705 is about 195.1124050595.

The spelling of 7427705 in words is "seven million, four hundred twenty-seven thousand, seven hundred five".