4120450261 has 2 divisors, whose sum is σ = 4120450262. Its totient is φ = 4120450260.

The previous prime is 4120450249. The next prime is 4120450303. The reversal of 4120450261 is 1620540214.

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., 3454500625 + 665949636 = 58775^2 + 25806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4120450261 is a prime.

It is a super-2 number, since 2×4120450261² = 33956220706749936242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4120450211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060225130 + 2060225131.

It is an arithmetic number, because the mean of its divisors is an integer number (2060225131).

Almost surely, 2^4120450261 is an apocalyptic number.

It is an amenable number.

4120450261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4120450261 is an equidigital number, since it uses as much as digits as its factorization.

4120450261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4120450261 is about 64190.7334511766. The cubic root of 4120450261 is about 1603.1773139802.

Adding to 4120450261 its reverse (1620540214), we get a palindrome (5740990475).

The spelling of 4120450261 in words is "four billion, one hundred twenty million, four hundred fifty thousand, two hundred sixty-one".