4978565 has 4 divisors (see below), whose sum is σ = 5974284. Its totient is φ = 3982848.

The previous prime is 4978559. The next prime is 4978577. The reversal of 4978565 is 5658794.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5658794 = 2 ⋅2829397.

It can be written as a sum of positive squares in 2 ways, for example, as 954529 + 4024036 = 977^2 + 2006^2 .

It is a cyclic number.

It is not a de Polignac number, because 4978565 - 2¹⁰ = 4977541 is a prime.

It is a super-2 number, since 2×4978565² = 49572218918450, which contains 22 as substring.

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, 497852 + ... + 497861.

It is an arithmetic number, because the mean of its divisors is an integer number (1493571).

Almost surely, 2^4978565 is an apocalyptic number.

It is an amenable number.

4978565 is a deficient number, since it is larger than the sum of its proper divisors (995719).

4978565 is an equidigital number, since it uses as much as digits as its factorization.

4978565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995718.

The product of its digits is 302400, while the sum is 44.

The square root of 4978565 is about 2231.2698178392. The cubic root of 4978565 is about 170.7528890868.

The spelling of 4978565 in words is "four million, nine hundred seventy-eight thousand, five hundred sixty-five".