2581002 has 24 divisors (see below), whose sum is σ = 5625984. Its totient is φ = 855144.

The previous prime is 2580997. The next prime is 2581003. The reversal of 2581002 is 2001852.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3693 + ... + 4335.

It is an arithmetic number, because the mean of its divisors is an integer number (234416).

2^2581002 is an apocalyptic number.

2581002 is an abundant number, since it is smaller than the sum of its proper divisors (3044982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2581002 is a wasteful number, since it uses less digits than its factorization.

2581002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2581002 is about 1606.5497191186. The cubic root of 2581002 is about 137.1711502266.

Adding to 2581002 its reverse (2001852), we get a palindrome (4582854).

The spelling of 2581002 in words is "two million, five hundred eighty-one thousand, two".