1249116731 has 2 divisors, whose sum is σ = 1249116732. Its totient is φ = 1249116730.

The previous prime is 1249116727. The next prime is 1249116749. The reversal of 1249116731 is 1376119421.

It is a weak prime.

It is an emirp because it is prime and its reverse (1376119421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249116731 - 2² = 1249116727 is a prime.

It is a super-2 number, since 2×1249116731² = 3120585215328252722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1249116691 and 1249116700.

It is not a weakly prime, because it can be changed into another prime (1249116751) 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, 624558365 + 624558366.

It is an arithmetic number, because the mean of its divisors is an integer number (624558366).

Almost surely, 2^1249116731 is an apocalyptic number.

1249116731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249116731 is an equidigital number, since it uses as much as digits as its factorization.

1249116731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1249116731 is about 35342.8455419198. The cubic root of 1249116731 is about 1076.9635591803.

The spelling of 1249116731 in words is "one billion, two hundred forty-nine million, one hundred sixteen thousand, seven hundred thirty-one".