1268155033 has 2 divisors, whose sum is σ = 1268155034. Its totient is φ = 1268155032.

The previous prime is 1268154973. The next prime is 1268155061. The reversal of 1268155033 is 3305518621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261457289 + 6697744 = 35517^2 + 2588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268155033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1268155033.

It is not a weakly prime, because it can be changed into another prime (1268155093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634077516 + 634077517.

It is an arithmetic number, because the mean of its divisors is an integer number (634077517).

Almost surely, 2^1268155033 is an apocalyptic number.

It is an amenable number.

1268155033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268155033 is an equidigital number, since it uses as much as digits as its factorization.

1268155033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1268155033 is about 35611.1644431911. The cubic root of 1268155033 is about 1082.4074760510.

The spelling of 1268155033 in words is "one billion, two hundred sixty-eight million, one hundred fifty-five thousand, thirty-three".