2532581 has 4 divisors (see below), whose sum is σ = 2537964. Its totient is φ = 2527200.

The previous prime is 2532559. The next prime is 2532587. The reversal of 2532581 is 1852352.

2532581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1612900 + 919681 = 1270^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2532581 - 2¹⁴ = 2516197 is a prime.

It is a super-2 number, since 2×2532581² = 12827933043122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2532581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2532587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910 + ... + 2951.

It is an arithmetic number, because the mean of its divisors is an integer number (634491).

2^2532581 is an apocalyptic number.

It is an amenable number.

2532581 is a deficient number, since it is larger than the sum of its proper divisors (5383).

2532581 is an equidigital number, since it uses as much as digits as its factorization.

2532581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5382.

The product of its digits is 2400, while the sum is 26.

The square root of 2532581 is about 1591.4084956415. The cubic root of 2532581 is about 136.3079275608.

It can be divided in two parts, 25325 and 81, that multiplied together give a triangular number (2051325 = T₂₀₂₅).

The spelling of 2532581 in words is "two million, five hundred thirty-two thousand, five hundred eighty-one".