1268731321 has 16 divisors (see below), whose sum is σ = 1491735168. Its totient is φ = 1063814400.

The previous prime is 1268731291. The next prime is 1268731351. The reversal of 1268731321 is 1231378621.

It is an interprime number because it is at equal distance from previous prime (1268731291) and next prime (1268731351).

It is not a de Polignac number, because 1268731321 - 2⁷ = 1268731193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1268731351) 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 in 15 ways as a sum of consecutive naturals, for example, 227041 + ... + 232561.

It is an arithmetic number, because the mean of its divisors is an integer number (93233448).

Almost surely, 2^1268731321 is an apocalyptic number.

1268731321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1268731321 is a deficient number, since it is larger than the sum of its proper divisors (223003847).

1268731321 is a wasteful number, since it uses less digits than its factorization.

1268731321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7152.

The product of its digits is 12096, while the sum is 34.

The square root of 1268731321 is about 35619.2549192147. The cubic root of 1268731321 is about 1082.5714107854.

The spelling of 1268731321 in words is "one billion, two hundred sixty-eight million, seven hundred thirty-one thousand, three hundred twenty-one".