1260985249 has 2 divisors, whose sum is σ = 1260985250. Its totient is φ = 1260985248.

The previous prime is 1260985237. The next prime is 1260985267. The reversal of 1260985249 is 9425890621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046069649 + 214915600 = 32343^2 + 14660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260985249 - 2¹⁵ = 1260952481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1260985199 and 1260985208.

It is not a weakly prime, because it can be changed into another prime (1260985549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630492624 + 630492625.

It is an arithmetic number, because the mean of its divisors is an integer number (630492625).

Almost surely, 2^1260985249 is an apocalyptic number.

It is an amenable number.

1260985249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260985249 is an equidigital number, since it uses as much as digits as its factorization.

1260985249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 1260985249 is about 35510.3541097523. The cubic root of 1260985249 is about 1080.3637460744.

The spelling of 1260985249 in words is "one billion, two hundred sixty million, nine hundred eighty-five thousand, two hundred forty-nine".