2465581 has 4 divisors (see below), whose sum is σ = 2469052. Its totient is φ = 2462112.

The previous prime is 2465579. The next prime is 2465587. The reversal of 2465581 is 1855642.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1855642 = 2 ⋅927821.

It can be written as a sum of positive squares in 2 ways, for example, as 1988100 + 477481 = 1410^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2465581 - 2¹ = 2465579 is a prime.

It is a super-2 number, since 2×2465581² = 12158179335122, which contains 22 as substring.

It is a Duffinian number.

2465581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2465587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240 + ... + 2233.

It is an arithmetic number, because the mean of its divisors is an integer number (617263).

2^2465581 is an apocalyptic number.

It is an amenable number.

2465581 is a deficient number, since it is larger than the sum of its proper divisors (3471).

2465581 is an equidigital number, since it uses as much as digits as its factorization.

2465581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470.

The product of its digits is 9600, while the sum is 31.

The square root of 2465581 is about 1570.2168640032. The cubic root of 2465581 is about 135.0951501135.

The spelling of 2465581 in words is "two million, four hundred sixty-five thousand, five hundred eighty-one".