7481605 has 4 divisors (see below), whose sum is σ = 8977932. Its totient is φ = 5985280.

The previous prime is 7481603. The next prime is 7481609. The reversal of 7481605 is 5061847.

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 5527201 + 1954404 = 2351^2 + 1398^2 .

It is not a de Polignac number, because 7481605 - 2¹ = 7481603 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7481603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748156 + ... + 748165.

It is an arithmetic number, because the mean of its divisors is an integer number (2244483).

Almost surely, 2^7481605 is an apocalyptic number.

It is an amenable number.

7481605 is a deficient number, since it is larger than the sum of its proper divisors (1496327).

7481605 is a wasteful number, since it uses less digits than its factorization.

7481605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496326.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 7481605 is about 2735.2522735572. The cubic root of 7481605 is about 195.5832199561.

The spelling of 7481605 in words is "seven million, four hundred eighty-one thousand, six hundred five".