7420705 has 4 divisors (see below), whose sum is σ = 8904852. Its totient is φ = 5936560.

The previous prime is 7420703. The next prime is 7420709. The reversal of 7420705 is 5070247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2611456 + 4809249 = 1616^2 + 2193^2 .

It is not a de Polignac number, because 7420705 - 2¹ = 7420703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7420705.

It is not an unprimeable number, because it can be changed into a prime (7420703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742066 + ... + 742075.

It is an arithmetic number, because the mean of its divisors is an integer number (2226213).

Almost surely, 2^7420705 is an apocalyptic number.

It is an amenable number.

7420705 is a deficient number, since it is larger than the sum of its proper divisors (1484147).

7420705 is a wasteful number, since it uses less digits than its factorization.

7420705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484146.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 7420705 is about 2724.0970981226. The cubic root of 7420705 is about 195.0510933395.

The spelling of 7420705 in words is "seven million, four hundred twenty thousand, seven hundred five".