4261512491 has 2 divisors, whose sum is σ = 4261512492. Its totient is φ = 4261512490.

The previous prime is 4261512443. The next prime is 4261512499. The reversal of 4261512491 is 1942151624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4261512491 is a prime.

It is not a weakly prime, because it can be changed into another prime (4261512499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2130756245 + 2130756246.

It is an arithmetic number, because the mean of its divisors is an integer number (2130756246).

Almost surely, 2^4261512491 is an apocalyptic number.

4261512491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4261512491 is an equidigital number, since it uses as much as digits as its factorization.

4261512491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 4261512491 is about 65280.2611131420. The cubic root of 4261512491 is about 1621.2671702946.

The spelling of 4261512491 in words is "four billion, two hundred sixty-one million, five hundred twelve thousand, four hundred ninety-one".