1268143321 has 9 divisors (see below), whose sum is σ = 1282075711. Its totient is φ = 1254361864.

The previous prime is 1268143309. The next prime is 1268143333. The reversal of 1268143321 is 1233418621.

The square root of 1268143321 is 35611.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1268143309) and next prime (1268143333).

It can be written as a sum of positive squares in only one way, i.e., 148571721 + 1119571600 = 12189^2 + 33460^2 .

It is not a de Polignac number, because 1268143321 - 2⁷ = 1268143193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268143021) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5305920 + ... + 5306158.

Almost surely, 2^1268143321 is an apocalyptic number.

1268143321 is the 35611-st square number.

1268143321 is the 17806-th centered octagonal number.

It is an amenable number.

1268143321 is a deficient number, since it is larger than the sum of its proper divisors (13932390).

1268143321 is an frugal number, since it uses more digits than its factorization.

1268143321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 388 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The cubic root of 1268143321 is about 1082.4041438624.

The spelling of 1268143321 in words is "one billion, two hundred sixty-eight million, one hundred forty-three thousand, three hundred twenty-one".