2581369 has 12 divisors (see below), whose sum is σ = 3032400. Its totient is φ = 2190888.

The previous prime is 2581367. The next prime is 2581373. The reversal of 2581369 is 9631852.

2581369 = T₁₁₉ + T₁₂₀ + ... + T₂₅₇.

It is not a de Polignac number, because 2581369 - 2¹ = 2581367 is a prime.

It is a super-2 number, since 2×2581369² = 13326931828322, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2581367) 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, 6622 + ... + 7000.

It is an arithmetic number, because the mean of its divisors is an integer number (252700).

2^2581369 is an apocalyptic number.

It is an amenable number.

2581369 is a deficient number, since it is larger than the sum of its proper divisors (451031).

2581369 is a wasteful number, since it uses less digits than its factorization.

2581369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 525 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 2581369 is about 1606.6639349908. The cubic root of 2581369 is about 137.1776515035.

The spelling of 2581369 in words is "two million, five hundred eighty-one thousand, three hundred sixty-nine".