4122581 has 4 divisors (see below), whose sum is σ = 4129164. Its totient is φ = 4116000.

The previous prime is 4122571. The next prime is 4122583. The reversal of 4122581 is 1852214.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3496900 + 625681 = 1870^2 + 791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4122581 is a prime.

It is a super-2 number, since 2×4122581² = 33991348203122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4122583) 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, 2240 + ... + 3641.

It is an arithmetic number, because the mean of its divisors is an integer number (1032291).

Almost surely, 2^4122581 is an apocalyptic number.

It is an amenable number.

4122581 is a deficient number, since it is larger than the sum of its proper divisors (6583).

4122581 is an equidigital number, since it uses as much as digits as its factorization.

4122581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582.

The product of its digits is 640, while the sum is 23.

The square root of 4122581 is about 2030.4139971937. The cubic root of 4122581 is about 160.3453607716.

Adding to 4122581 its reverse (1852214), we get a palindrome (5974795).

It can be divided in two parts, 41 and 22581, that added together give a palindrome (22622).

The spelling of 4122581 in words is "four million, one hundred twenty-two thousand, five hundred eighty-one".