2591090 has 16 divisors (see below), whose sum is σ = 4707288. Its totient is φ = 1026816.

The previous prime is 2591059. The next prime is 2591093. The reversal of 2591090 is 901952.

It is a happy number.

2591090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1006009 + 1585081 = 1003^2 + 1259^2 .

It is not an unprimeable number, because it can be changed into a prime (2591093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17 + ... + 2276.

2^2591090 is an apocalyptic number.

2591090 is a deficient number, since it is larger than the sum of its proper divisors (2116198).

2591090 is a wasteful number, since it uses less digits than its factorization.

2591090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 2591090 is about 1609.6863048433. The cubic root of 2591090 is about 137.3496317624.

The spelling of 2591090 in words is "two million, five hundred ninety-one thousand, ninety".