2825581 has 8 divisors (see below), whose sum is σ = 3133728. Its totient is φ = 2526000.

The previous prime is 2825567. The next prime is 2825639. The reversal of 2825581 is 1855282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2825581 - 2¹³ = 2817389 is a prime.

It is a super-2 number, since 2×2825581² = 15967815975122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2825521) 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 7 ways as a sum of consecutive naturals, for example, 1435 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (391716).

2^2825581 is an apocalyptic number.

It is an amenable number.

2825581 is a deficient number, since it is larger than the sum of its proper divisors (308147).

2825581 is a wasteful number, since it uses less digits than its factorization.

2825581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283.

The product of its digits is 6400, while the sum is 31.

The square root of 2825581 is about 1680.9464595876. The cubic root of 2825581 is about 141.3739049052.

Subtracting from 2825581 its reverse (1855282), we obtain a cube (970299 = 99³).

The spelling of 2825581 in words is "two million, eight hundred twenty-five thousand, five hundred eighty-one".