1268901587 has 2 divisors, whose sum is σ = 1268901588. Its totient is φ = 1268901586.

The previous prime is 1268901581. The next prime is 1268901631. The reversal of 1268901587 is 7851098621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1268901587 - 2¹² = 1268897491 is a prime.

It is a super-2 number, since 2×1268901587² = 3220222474982237138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1268901581) 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, 634450793 + 634450794.

It is an arithmetic number, because the mean of its divisors is an integer number (634450794).

Almost surely, 2^1268901587 is an apocalyptic number.

1268901587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268901587 is an equidigital number, since it uses as much as digits as its factorization.

1268901587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 1268901587 is about 35621.6449227152. The cubic root of 1268901587 is about 1082.6198362889.

The spelling of 1268901587 in words is "one billion, two hundred sixty-eight million, nine hundred one thousand, five hundred eighty-seven".