1248265213 has 18 divisors (see below), whose sum is σ = 1383662042. Its totient is φ = 1119437760.

The previous prime is 1248265201. The next prime is 1248265219. The reversal of 1248265213 is 3125628421.

It can be written as a sum of positive squares in 3 ways, for example, as 160452889 + 1087812324 = 12667^2 + 32982^2 .

It is not a de Polignac number, because 1248265213 - 2⁵ = 1248265181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248265219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5222748 + ... + 5222986.

Almost surely, 2^1248265213 is an apocalyptic number.

1248265213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1248265213 is a deficient number, since it is larger than the sum of its proper divisors (135396829).

1248265213 is an frugal number, since it uses more digits than its factorization.

1248265213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 293 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 1248265213 is about 35330.7969482716. The cubic root of 1248265213 is about 1076.7187829327.

The spelling of 1248265213 in words is "one billion, two hundred forty-eight million, two hundred sixty-five thousand, two hundred thirteen".