4057661 has 2 divisors, whose sum is σ = 4057662. Its totient is φ = 4057660.

The previous prime is 4057657. The next prime is 4057663. The reversal of 4057661 is 1667504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4020025 + 37636 = 2005^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 4057661 - 2² = 4057657 is a prime.

It is a super-2 number, since 2×4057661² = 32929225581842, which contains 22 as substring.

Together with 4057663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4057663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2028830 + 2028831.

It is an arithmetic number, because the mean of its divisors is an integer number (2028831).

Almost surely, 2^4057661 is an apocalyptic number.

It is an amenable number.

4057661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4057661 is an equidigital number, since it uses as much as digits as its factorization.

4057661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 4057661 is about 2014.3636712371. The cubic root of 4057661 is about 159.4992285809.

The spelling of 4057661 in words is "four million, fifty-seven thousand, six hundred sixty-one".