2108451 has 4 divisors (see below), whose sum is σ = 2811272. Its totient is φ = 1405632.

The previous prime is 2108443. The next prime is 2108453. The reversal of 2108451 is 1548012.

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

It is not a de Polignac number, because 2108451 - 2³ = 2108443 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351406 + ... + 351411.

It is an arithmetic number, because the mean of its divisors is an integer number (702818).

2^2108451 is an apocalyptic number.

2108451 is a deficient number, since it is larger than the sum of its proper divisors (702821).

2108451 is an equidigital number, since it uses as much as digits as its factorization.

2108451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702820.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 2108451 is about 1452.0506189524. The cubic root of 2108451 is about 128.2294671292.

The spelling of 2108451 in words is "two million, one hundred eight thousand, four hundred fifty-one".