1265000749 has 2 divisors, whose sum is σ = 1265000750. Its totient is φ = 1265000748.

The previous prime is 1265000741. The next prime is 1265000771. The reversal of 1265000749 is 9470005621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1264158025 + 842724 = 35555^2 + 918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265000749 - 2³ = 1265000741 is a prime.

It is a super-2 number, since 2×1265000749² = 3200453789941122002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265000741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632500374 + 632500375.

It is an arithmetic number, because the mean of its divisors is an integer number (632500375).

Almost surely, 2^1265000749 is an apocalyptic number.

It is an amenable number.

1265000749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265000749 is an equidigital number, since it uses as much as digits as its factorization.

1265000749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1265000749 is about 35566.8490170271. The cubic root of 1265000749 is about 1081.5093063624.

The spelling of 1265000749 in words is "one billion, two hundred sixty-five million, seven hundred forty-nine", and thus it is an aban number.