2109458 has 18 divisors (see below), whose sum is σ = 3470229. Its totient is φ = 961272.

The previous prime is 2109449. The next prime is 2109461. The reversal of 2109458 is 8549012.

It can be written as a sum of positive squares in 2 ways, for example, as 1803649 + 305809 = 1343^2 + 553^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1027.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2109458.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26663 + ... + 26741.

2^2109458 is an apocalyptic number.

2109458 is a deficient number, since it is larger than the sum of its proper divisors (1360771).

2109458 is an equidigital number, since it uses as much as digits as its factorization.

2109458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2109458 is about 1452.3973285572. The cubic root of 2109458 is about 128.2498780884.

The spelling of 2109458 in words is "two million, one hundred nine thousand, four hundred fifty-eight".