2581461 has 12 divisors (see below), whose sum is σ = 3768492. Its totient is φ = 1702656.

The previous prime is 2581457. The next prime is 2581477. The reversal of 2581461 is 1641852.

It can be written as a sum of positive squares in 2 ways, for example, as 799236 + 1782225 = 894^2 + 1335^2 .

It is not a de Polignac number, because 2581461 - 2² = 2581457 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581441) 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 11 ways as a sum of consecutive naturals, for example, 606 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (314041).

2^2581461 is an apocalyptic number.

It is an amenable number.

2581461 is a deficient number, since it is larger than the sum of its proper divisors (1187031).

2581461 is a wasteful number, since it uses less digits than its factorization.

2581461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3057 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2581461 is about 1606.6925654897. The cubic root of 2581461 is about 137.1792811548.

The spelling of 2581461 in words is "two million, five hundred eighty-one thousand, four hundred sixty-one".