2581249 has 4 divisors (see below), whose sum is σ = 2815920. Its totient is φ = 2346580.

The previous prime is 2581223. The next prime is 2581253. The reversal of 2581249 is 9421852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2581249 - 2⁷ = 2581121 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2581249.

It is not an unprimeable number, because it can be changed into a prime (2581219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117319 + ... + 117340.

It is an arithmetic number, because the mean of its divisors is an integer number (703980).

2^2581249 is an apocalyptic number.

It is an amenable number.

2581249 is a deficient number, since it is larger than the sum of its proper divisors (234671).

2581249 is a wasteful number, since it uses less digits than its factorization.

2581249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234670.

The product of its digits is 5760, while the sum is 31.

The square root of 2581249 is about 1606.6265900949. The cubic root of 2581249 is about 137.1755258132.

The spelling of 2581249 in words is "two million, five hundred eighty-one thousand, two hundred forty-nine".