1263926551 has 2 divisors, whose sum is σ = 1263926552. Its totient is φ = 1263926550.

The previous prime is 1263926507. The next prime is 1263926579. The reversal of 1263926551 is 1556293621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263926551 - 2¹¹ = 1263924503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263920551) 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, 631963275 + 631963276.

It is an arithmetic number, because the mean of its divisors is an integer number (631963276).

Almost surely, 2^1263926551 is an apocalyptic number.

1263926551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263926551 is an equidigital number, since it uses as much as digits as its factorization.

1263926551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 1263926551 is about 35551.7446969906. The cubic root of 1263926551 is about 1081.2030920165.

The spelling of 1263926551 in words is "one billion, two hundred sixty-three million, nine hundred twenty-six thousand, five hundred fifty-one".