2581011 has 16 divisors (see below), whose sum is σ = 3863200. Its totient is φ = 1702944.

The previous prime is 2581003. The next prime is 2581013. The reversal of 2581011 is 1101852.

It is not a de Polignac number, because 2581011 - 2³ = 2581003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2505 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (241450).

2^2581011 is an apocalyptic number.

2581011 is a deficient number, since it is larger than the sum of its proper divisors (1282189).

2581011 is a wasteful number, since it uses less digits than its factorization.

2581011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 2581011 is about 1606.5525201499. The cubic root of 2581011 is about 137.1713096658.

Adding to 2581011 its reverse (1101852), we get a palindrome (3682863).

The spelling of 2581011 in words is "two million, five hundred eighty-one thousand, eleven".