7975405 has 4 divisors (see below), whose sum is σ = 9570492. Its totient is φ = 6380320.

The previous prime is 7975399. The next prime is 7975417. The reversal of 7975405 is 5045797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5045797 = 29 ⋅173993.

It can be written as a sum of positive squares in 2 ways, for example, as 5846724 + 2128681 = 2418^2 + 1459^2 .

It is not a de Polignac number, because 7975405 - 2⁹ = 7974893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797536 + ... + 797545.

It is an arithmetic number, because the mean of its divisors is an integer number (2392623).

Almost surely, 2^7975405 is an apocalyptic number.

It is an amenable number.

7975405 is a deficient number, since it is larger than the sum of its proper divisors (1595087).

7975405 is a wasteful number, since it uses less digits than its factorization.

7975405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595086.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 7975405 is about 2824.0759550692. The cubic root of 7975405 is about 199.7948312676.

The spelling of 7975405 in words is "seven million, nine hundred seventy-five thousand, four hundred five".