1249938139 has 2 divisors, whose sum is σ = 1249938140. Its totient is φ = 1249938138.

The previous prime is 1249938133. The next prime is 1249938143. The reversal of 1249938139 is 9318399421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1249938139 - 2¹¹ = 1249936091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1249938092 and 1249938101.

It is not a weakly prime, because it can be changed into another prime (1249938133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624969069 + 624969070.

It is an arithmetic number, because the mean of its divisors is an integer number (624969070).

Almost surely, 2^1249938139 is an apocalyptic number.

1249938139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249938139 is an equidigital number, since it uses as much as digits as its factorization.

1249938139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 1249938139 is about 35354.4642018515. The cubic root of 1249938139 is about 1077.1995746582.

The spelling of 1249938139 in words is "one billion, two hundred forty-nine million, nine hundred thirty-eight thousand, one hundred thirty-nine".