1296407551 has 2 divisors, whose sum is σ = 1296407552. Its totient is φ = 1296407550.

The previous prime is 1296407549. The next prime is 1296407557. The reversal of 1296407551 is 1557046921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296407551 - 2¹ = 1296407549 is a prime.

Together with 1296407549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296407557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648203775 + 648203776.

It is an arithmetic number, because the mean of its divisors is an integer number (648203776).

Almost surely, 2^1296407551 is an apocalyptic number.

1296407551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296407551 is an equidigital number, since it uses as much as digits as its factorization.

1296407551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 1296407551 is about 36005.6599856189. The cubic root of 1296407551 is about 1090.3866291097.

The spelling of 1296407551 in words is "one billion, two hundred ninety-six million, four hundred seven thousand, five hundred fifty-one".