2586991 has 4 divisors (see below), whose sum is σ = 2822184. Its totient is φ = 2351800.

The previous prime is 2586989. The next prime is 2587001. The reversal of 2586991 is 1996852.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2586991 - 2¹ = 2586989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2586911) 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, 117580 + ... + 117601.

It is an arithmetic number, because the mean of its divisors is an integer number (705546).

2^2586991 is an apocalyptic number.

2586991 is a deficient number, since it is larger than the sum of its proper divisors (235193).

2586991 is a wasteful number, since it uses less digits than its factorization.

2586991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235192.

The product of its digits is 38880, while the sum is 40.

The square root of 2586991 is about 1608.4125714505. The cubic root of 2586991 is about 137.2771663417.

The spelling of 2586991 in words is "two million, five hundred eighty-six thousand, nine hundred ninety-one".