2005451 has 4 divisors (see below), whose sum is σ = 2291952. Its totient is φ = 1718952.

The previous prime is 2005447. The next prime is 2005453. The reversal of 2005451 is 1545002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005451 - 2² = 2005447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143240 + ... + 143253.

It is an arithmetic number, because the mean of its divisors is an integer number (572988).

2^2005451 is an apocalyptic number.

2005451 is a deficient number, since it is larger than the sum of its proper divisors (286501).

2005451 is an equidigital number, since it uses as much as digits as its factorization.

2005451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286500.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2005451 is about 1416.1394705325. The cubic root of 2005451 is about 126.1064649837.

The spelling of 2005451 in words is "two million, five thousand, four hundred fifty-one".