1249385321 has 2 divisors, whose sum is σ = 1249385322. Its totient is φ = 1249385320.

The previous prime is 1249385311. The next prime is 1249385341. The reversal of 1249385321 is 1235839421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114825321 + 134560000 = 33389^2 + 11600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249385321 - 2¹⁴ = 1249368937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1249385311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624692660 + 624692661.

It is an arithmetic number, because the mean of its divisors is an integer number (624692661).

Almost surely, 2^1249385321 is an apocalyptic number.

It is an amenable number.

1249385321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249385321 is an equidigital number, since it uses as much as digits as its factorization.

1249385321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 1249385321 is about 35346.6451166161. The cubic root of 1249385321 is about 1077.0407446307.

The spelling of 1249385321 in words is "one billion, two hundred forty-nine million, three hundred eighty-five thousand, three hundred twenty-one".