4052581 has 4 divisors (see below), whose sum is σ = 4364332. Its totient is φ = 3740832.

The previous prime is 4052561. The next prime is 4052611. The reversal of 4052581 is 1852504.

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 2452356 + 1600225 = 1566^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 4052581 - 2⁵ = 4052549 is a prime.

It is a super-2 number, since 2×4052581² = 32846825523122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4052501) 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, 155856 + ... + 155881.

It is an arithmetic number, because the mean of its divisors is an integer number (1091083).

Almost surely, 2^4052581 is an apocalyptic number.

It is an amenable number.

4052581 is a deficient number, since it is larger than the sum of its proper divisors (311751).

4052581 is a wasteful number, since it uses less digits than its factorization.

4052581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311750.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 4052581 is about 2013.1023322226. The cubic root of 4052581 is about 159.4326389495.

The spelling of 4052581 in words is "four million, fifty-two thousand, five hundred eighty-one".