4120661 has 2 divisors, whose sum is σ = 4120662. Its totient is φ = 4120660.

The previous prime is 4120651. The next prime is 4120673. The reversal of 4120661 is 1660214.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3276100 + 844561 = 1810^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 4120661 - 2¹⁴ = 4104277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4120621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060330 + 2060331.

It is an arithmetic number, because the mean of its divisors is an integer number (2060331).

Almost surely, 2^4120661 is an apocalyptic number.

It is an amenable number.

4120661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4120661 is an equidigital number, since it uses as much as digits as its factorization.

4120661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4120661 is about 2029.9411321514. The cubic root of 4120661 is about 160.3204644830.

Adding to 4120661 its reverse (1660214), we get a palindrome (5780875).

It can be divided in two parts, 41 and 20661, that added together give a palindrome (20702).

The spelling of 4120661 in words is "four million, one hundred twenty thousand, six hundred sixty-one".