1249137361 has 2 divisors, whose sum is σ = 1249137362. Its totient is φ = 1249137360.

The previous prime is 1249137313. The next prime is 1249137371. The reversal of 1249137361 is 1637319421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1245737025 + 3400336 = 35295^2 + 1844^2 .

It is an emirp because it is prime and its reverse (1637319421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249137361 - 2⁷ = 1249137233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1249137361.

It is not a weakly prime, because it can be changed into another prime (1249137371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624568680 + 624568681.

It is an arithmetic number, because the mean of its divisors is an integer number (624568681).

Almost surely, 2^1249137361 is an apocalyptic number.

It is an amenable number.

1249137361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249137361 is an equidigital number, since it uses as much as digits as its factorization.

1249137361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 1249137361 is about 35343.1373961056. The cubic root of 1249137361 is about 1076.9694880727.

The spelling of 1249137361 in words is "one billion, two hundred forty-nine million, one hundred thirty-seven thousand, three hundred sixty-one".