1248697609 has 4 divisors (see below), whose sum is σ = 1250479620. Its totient is φ = 1246915600.

The previous prime is 1248697601. The next prime is 1248697627. The reversal of 1248697609 is 9067968421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 419430400 + 829267209 = 20480^2 + 28797^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248697609 - 2³ = 1248697601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248697601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889954 + ... + 891355.

It is an arithmetic number, because the mean of its divisors is an integer number (312619905).

Almost surely, 2^1248697609 is an apocalyptic number.

It is an amenable number.

1248697609 is a deficient number, since it is larger than the sum of its proper divisors (1782011).

1248697609 is an equidigital number, since it uses as much as digits as its factorization.

1248697609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782010.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 1248697609 is about 35336.9156690280. The cubic root of 1248697609 is about 1076.8430928264.

The spelling of 1248697609 in words is "one billion, two hundred forty-eight million, six hundred ninety-seven thousand, six hundred nine".