1265000173 has 2 divisors, whose sum is σ = 1265000174. Its totient is φ = 1265000172.

The previous prime is 1265000147. The next prime is 1265000227. The reversal of 1265000173 is 3710005621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1059307209 + 205692964 = 32547^2 + 14342^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265000173 - 2¹⁷ = 1264869101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265000773) 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 as a sum of consecutive naturals, namely, 632500086 + 632500087.

It is an arithmetic number, because the mean of its divisors is an integer number (632500087).

Almost surely, 2^1265000173 is an apocalyptic number.

It is an amenable number.

1265000173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265000173 is an equidigital number, since it uses as much as digits as its factorization.

1265000173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1265000173 is about 35566.8409195981. The cubic root of 1265000173 is about 1081.5091422125.

Adding to 1265000173 its reverse (3710005621), we get a palindrome (4975005794).

The spelling of 1265000173 in words is "one billion, two hundred sixty-five million, one hundred seventy-three", and thus it is an aban number.