1249504247 has 2 divisors, whose sum is σ = 1249504248. Its totient is φ = 1249504246.

The previous prime is 1249504241. The next prime is 1249504261. The reversal of 1249504247 is 7424059421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1249504247 - 2¹² = 1249500151 is a prime.

It is a super-2 number, since 2×1249504247² = 3122521726542074018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1249504247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249504241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624752123 + 624752124.

It is an arithmetic number, because the mean of its divisors is an integer number (624752124).

Almost surely, 2^1249504247 is an apocalyptic number.

1249504247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249504247 is an equidigital number, since it uses as much as digits as its factorization.

1249504247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1249504247 is about 35348.3273578822. The cubic root of 1249504247 is about 1077.0749171904.

The spelling of 1249504247 in words is "one billion, two hundred forty-nine million, five hundred four thousand, two hundred forty-seven".