1253273249 has 2 divisors, whose sum is σ = 1253273250. Its totient is φ = 1253273248.

The previous prime is 1253273237. The next prime is 1253273267. The reversal of 1253273249 is 9423723521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731973025 + 521300224 = 27055^2 + 22832^2 .

It is an emirp because it is prime and its reverse (9423723521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253273249 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 (1253273209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626636624 + 626636625.

It is an arithmetic number, because the mean of its divisors is an integer number (626636625).

Almost surely, 2^1253273249 is an apocalyptic number.

It is an amenable number.

1253273249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253273249 is an equidigital number, since it uses as much as digits as its factorization.

1253273249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 1253273249 is about 35401.5995260101. The cubic root of 1253273249 is about 1078.1567923065.

The spelling of 1253273249 in words is "one billion, two hundred fifty-three million, two hundred seventy-three thousand, two hundred forty-nine".