4057561 has 2 divisors, whose sum is σ = 4057562. Its totient is φ = 4057560.

The previous prime is 4057553. The next prime is 4057567. The reversal of 4057561 is 1657504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3610000 + 447561 = 1900^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 4057561 - 2³ = 4057553 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (4057567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2028780 + 2028781.

It is an arithmetic number, because the mean of its divisors is an integer number (2028781).

Almost surely, 2^4057561 is an apocalyptic number.

It is an amenable number.

4057561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4057561 is an equidigital number, since it uses as much as digits as its factorization.

4057561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 4057561 is about 2014.3388493498. The cubic root of 4057561 is about 159.4979182978.

The spelling of 4057561 in words is "four million, fifty-seven thousand, five hundred sixty-one".