2119581 has 16 divisors (see below), whose sum is σ = 3249600. Its totient is φ = 1363824.

The previous prime is 2119573. The next prime is 2119589. The reversal of 2119581 is 1859112.

2119581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2119573) and next prime (2119589).

It is not a de Polignac number, because 2119581 - 2³ = 2119573 is a prime.

It is a super-2 number, since 2×2119581² = 8985247231122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2119589) 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 15 ways as a sum of consecutive naturals, for example, 571 + ... + 2136.

It is an arithmetic number, because the mean of its divisors is an integer number (203100).

2^2119581 is an apocalyptic number.

It is an amenable number.

2119581 is a deficient number, since it is larger than the sum of its proper divisors (1130019).

2119581 is a wasteful number, since it uses less digits than its factorization.

2119581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745 (or 2739 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 2119581 is about 1455.8780855552. The cubic root of 2119581 is about 128.4547019956.

The spelling of 2119581 in words is "two million, one hundred nineteen thousand, five hundred eighty-one".