2581001 has 4 divisors (see below), whose sum is σ = 2595600. Its totient is φ = 2566404.

The previous prime is 2580997. The next prime is 2581003. The reversal of 2581001 is 1001852.

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 2581001 - 2² = 2580997 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 7031 + ... + 7388.

It is an arithmetic number, because the mean of its divisors is an integer number (648900).

2^2581001 is an apocalyptic number.

It is an amenable number.

2581001 is a deficient number, since it is larger than the sum of its proper divisors (14599).

2581001 is a wasteful number, since it uses less digits than its factorization.

2581001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14598.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2581001 is about 1606.5494078926. The cubic root of 2581001 is about 137.1711325111.

Adding to 2581001 its reverse (1001852), we get a palindrome (3582853).

The spelling of 2581001 in words is "two million, five hundred eighty-one thousand, one".