2005457 has 4 divisors (see below), whose sum is σ = 2021376. Its totient is φ = 1989540.

The previous prime is 2005453. The next prime is 2005459. The reversal of 2005457 is 7545002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2005457 - 2² = 2005453 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7769 + ... + 8022.

It is an arithmetic number, because the mean of its divisors is an integer number (505344).

2^2005457 is an apocalyptic number.

It is an amenable number.

2005457 is a deficient number, since it is larger than the sum of its proper divisors (15919).

2005457 is a wasteful number, since it uses less digits than its factorization.

2005457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15918.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 2005457 is about 1416.1415889663. The cubic root of 2005457 is about 126.1065907472.

The spelling of 2005457 in words is "two million, five thousand, four hundred fifty-seven".