4540661 has 2 divisors, whose sum is σ = 4540662. Its totient is φ = 4540660.

The previous prime is 4540651. The next prime is 4540687. The reversal of 4540661 is 1660454.

It is a happy number.

It is an a-pointer prime, because the next prime (4540687) can be obtained adding 4540661 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3352561 + 1188100 = 1831^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 4540661 - 2¹⁴ = 4524277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4540661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4540651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270330 + 2270331.

It is an arithmetic number, because the mean of its divisors is an integer number (2270331).

Almost surely, 2^4540661 is an apocalyptic number.

It is an amenable number.

4540661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4540661 is an equidigital number, since it uses as much as digits as its factorization.

4540661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4540661 is about 2130.8826809564. The cubic root of 4540661 is about 165.5921302280.

The spelling of 4540661 in words is "four million, five hundred forty thousand, six hundred sixty-one".