1248308381 has 2 divisors, whose sum is σ = 1248308382. Its totient is φ = 1248308380.

The previous prime is 1248308377. The next prime is 1248308431. The reversal of 1248308381 is 1838038421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1042644100 + 205664281 = 32290^2 + 14341^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248308381 - 2² = 1248308377 is a prime.

It is a super-2 number, since 2×1248308381² = 3116547628149682322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248308081) 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 as a sum of consecutive naturals, namely, 624154190 + 624154191.

It is an arithmetic number, because the mean of its divisors is an integer number (624154191).

Almost surely, 2^1248308381 is an apocalyptic number.

It is an amenable number.

1248308381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248308381 is an equidigital number, since it uses as much as digits as its factorization.

1248308381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 1248308381 is about 35331.4078547685. The cubic root of 1248308381 is about 1076.7311946275.

The spelling of 1248308381 in words is "one billion, two hundred forty-eight million, three hundred eight thousand, three hundred eighty-one".