2581355 has 16 divisors (see below), whose sum is σ = 3573504. Its totient is φ = 1753440.

The previous prime is 2581349. The next prime is 2581357. The reversal of 2581355 is 5531852.

It is not a de Polignac number, because 2581355 - 2²⁰ = 1532779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581357) 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 15 ways as a sum of consecutive naturals, for example, 4304 + ... + 4866.

It is an arithmetic number, because the mean of its divisors is an integer number (223344).

2^2581355 is an apocalyptic number.

2581355 is a deficient number, since it is larger than the sum of its proper divisors (992149).

2581355 is a wasteful number, since it uses less digits than its factorization.

2581355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its digits is 6000, while the sum is 29.

The square root of 2581355 is about 1606.6595781310. The cubic root of 2581355 is about 137.1774035097.

The spelling of 2581355 in words is "two million, five hundred eighty-one thousand, three hundred fifty-five".