1268521671 has 16 divisors (see below), whose sum is σ = 1711390464. Its totient is φ = 835693824.

The previous prime is 1268521651. The next prime is 1268521679. The reversal of 1268521671 is 1761258621.

1268521671 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1268521671 - 2⁹ = 1268521159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268521679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213280 + ... + 219146.

It is an arithmetic number, because the mean of its divisors is an integer number (106961904).

Almost surely, 2^1268521671 is an apocalyptic number.

1268521671 is a deficient number, since it is larger than the sum of its proper divisors (442868793).

1268521671 is an equidigital number, since it uses as much as digits as its factorization.

1268521671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710.

The product of its digits is 40320, while the sum is 39.

The square root of 1268521671 is about 35616.3118668960. The cubic root of 1268521671 is about 1082.5117780917.

The spelling of 1268521671 in words is "one billion, two hundred sixty-eight million, five hundred twenty-one thousand, six hundred seventy-one".