4978581 has 4 divisors (see below), whose sum is σ = 6638112. Its totient is φ = 3319052.

The previous prime is 4978579. The next prime is 4978607. The reversal of 4978581 is 1858794.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4978581 - 2¹ = 4978579 is a prime.

It is a super-2 number, since 2×4978581² = 49572537547122, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4978081) 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, 829761 + ... + 829766.

It is an arithmetic number, because the mean of its divisors is an integer number (1659528).

Almost surely, 2^4978581 is an apocalyptic number.

It is an amenable number.

4978581 is a deficient number, since it is larger than the sum of its proper divisors (1659531).

4978581 is a wasteful number, since it uses less digits than its factorization.

4978581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659530.

The product of its digits is 80640, while the sum is 42.

The square root of 4978581 is about 2231.2734032386. The cubic root of 4978581 is about 170.7530720072.

The spelling of 4978581 in words is "four million, nine hundred seventy-eight thousand, five hundred eighty-one".