1249641047 has 2 divisors, whose sum is σ = 1249641048. Its totient is φ = 1249641046.

The previous prime is 1249640971. The next prime is 1249641061. The reversal of 1249641047 is 7401469421.

It is a strong prime.

It is an emirp because it is prime and its reverse (7401469421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249641047 - 2¹² = 1249636951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1249641047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249641847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624820523 + 624820524.

It is an arithmetic number, because the mean of its divisors is an integer number (624820524).

Almost surely, 2^1249641047 is an apocalyptic number.

1249641047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249641047 is an equidigital number, since it uses as much as digits as its factorization.

1249641047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1249641047 is about 35350.2623328314. The cubic root of 1249641047 is about 1077.1142230384.

The spelling of 1249641047 in words is "one billion, two hundred forty-nine million, six hundred forty-one thousand, forty-seven".