7900745 has 8 divisors (see below), whose sum is σ = 9515016. Its totient is φ = 6297856.

The previous prime is 7900709. The next prime is 7900757. The reversal of 7900745 is 5470097.

It can be written as a sum of positive squares in 4 ways, for example, as 4700224 + 3200521 = 2168^2 + 1789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7900745 - 2¹⁶ = 7835209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1232 + ... + 4161.

It is an arithmetic number, because the mean of its divisors is an integer number (1189377).

Almost surely, 2^7900745 is an apocalyptic number.

It is an amenable number.

7900745 is a deficient number, since it is larger than the sum of its proper divisors (1614271).

7900745 is a wasteful number, since it uses less digits than its factorization.

7900745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 7900745 is about 2810.8263909391. The cubic root of 7900745 is about 199.1694305466.

The spelling of 7900745 in words is "seven million, nine hundred thousand, seven hundred forty-five".