2581982 has 12 divisors (see below), whose sum is σ = 4194360. Its totient is φ = 1191528.

The previous prime is 2581973. The next prime is 2581991. The reversal of 2581982 is 2891852.

It is an interprime number because it is at equal distance from previous prime (2581973) and next prime (2581991).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3482 + ... + 4157.

It is an arithmetic number, because the mean of its divisors is an integer number (349530).

2^2581982 is an apocalyptic number.

2581982 is a deficient number, since it is larger than the sum of its proper divisors (1612378).

2581982 is a wasteful number, since it uses less digits than its factorization.

2581982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7667 (or 7654 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 2581982 is about 1606.8546916258. The cubic root of 2581982 is about 137.1885092106.

The spelling of 2581982 in words is "two million, five hundred eighty-one thousand, nine hundred eighty-two".