2581415 has 4 divisors (see below), whose sum is σ = 3097704. Its totient is φ = 2065128.

The previous prime is 2581409. The next prime is 2581417. The reversal of 2581415 is 5141852.

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

It is a cyclic number.

It is not a de Polignac number, because 2581415 - 2¹⁶ = 2515879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581417) 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, 258137 + ... + 258146.

It is an arithmetic number, because the mean of its divisors is an integer number (774426).

2^2581415 is an apocalyptic number.

2581415 is a deficient number, since it is larger than the sum of its proper divisors (516289).

2581415 is an equidigital number, since it uses as much as digits as its factorization.

2581415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516288.

The product of its digits is 1600, while the sum is 26.

The square root of 2581415 is about 1606.6782503040. The cubic root of 2581415 is about 137.1784663340.

The spelling of 2581415 in words is "two million, five hundred eighty-one thousand, four hundred fifteen".