2456420261 has 2 divisors, whose sum is σ = 2456420262.
Its totient is φ = 2456420260.
The previous prime is 2456420209. The next prime is 2456420311. The reversal of 2456420261 is 1620246542.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 2414248225 + 42172036 = 49135^2 + 6494^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-2456420261 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2456422261) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1228210130 + 1228210131.
It is an arithmetic number, because the mean of its divisors is an integer number (1228210131).
Almost surely, 22456420261 is an apocalyptic number.
It is an amenable number.
2456420261 is a deficient number, since it is larger than the sum of its proper divisors (1).
2456420261 is an equidigital number, since it uses as much as digits as its factorization.
2456420261 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 23040, while the sum is 32.
The square root of 2456420261 is about 49562.2866804993.
The cubic root of 2456420261 is about 1349.2762945026.
The spelling of 2456420261 in words is "two billion, four hundred fifty-six million, four hundred twenty thousand, two hundred sixty-one".