1248774239 has 2 divisors, whose sum is σ = 1248774240. Its totient is φ = 1248774238.

The previous prime is 1248774229. The next prime is 1248774257. The reversal of 1248774239 is 9324778421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248774239 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1248774193 and 1248774202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248774229) 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, 624387119 + 624387120.

It is an arithmetic number, because the mean of its divisors is an integer number (624387120).

Almost surely, 2^1248774239 is an apocalyptic number.

1248774239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248774239 is an equidigital number, since it uses as much as digits as its factorization.

1248774239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 1248774239 is about 35337.9999292546. Note that the first 4 decimals coincide. The cubic root of 1248774239 is about 1076.8651202566.

The spelling of 1248774239 in words is "one billion, two hundred forty-eight million, seven hundred seventy-four thousand, two hundred thirty-nine".