4585981 has 4 divisors (see below), whose sum is σ = 4593600. Its totient is φ = 4578364.

The previous prime is 4585979. The next prime is 4585991. The reversal of 4585981 is 1895854.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1895854 = 2 ⋅947927.

It is a cyclic number.

It is not a de Polignac number, because 4585981 - 2¹ = 4585979 is a prime.

It is a super-2 number, since 2×4585981² = 42062443464722, which contains 22 as substring.

It is a Duffinian number.

4585981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4585991) 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, 2821 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (1148400).

Almost surely, 2^4585981 is an apocalyptic number.

It is an amenable number.

4585981 is a deficient number, since it is larger than the sum of its proper divisors (7619).

4585981 is an equidigital number, since it uses as much as digits as its factorization.

4585981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7618.

The product of its digits is 57600, while the sum is 40.

The square root of 4585981 is about 2141.4903688786. The cubic root of 4585981 is about 166.1412283393.

The spelling of 4585981 in words is "four million, five hundred eighty-five thousand, nine hundred eighty-one".