4005457 has 2 divisors, whose sum is σ = 4005458. Its totient is φ = 4005456.

The previous prime is 4005433. The next prime is 4005467. The reversal of 4005457 is 7545004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3129361 + 876096 = 1769^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 4005457 - 2¹⁹ = 3481169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4005467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002728 + 2002729.

It is an arithmetic number, because the mean of its divisors is an integer number (2002729).

Almost surely, 2^4005457 is an apocalyptic number.

It is an amenable number.

4005457 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005457 is an equidigital number, since it uses as much as digits as its factorization.

4005457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 4005457 is about 2001.3637850226. The cubic root of 4005457 is about 158.8122594574.

The spelling of 4005457 in words is "four million, five thousand, four hundred fifty-seven".