1249325281 has 2 divisors, whose sum is σ = 1249325282. Its totient is φ = 1249325280.

The previous prime is 1249325279. The next prime is 1249325317. The reversal of 1249325281 is 1825239421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772339681 + 476985600 = 27791^2 + 21840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249325281 - 2¹ = 1249325279 is a prime.

It is a super-2 number, since 2×1249325281² = 3121627315491457922, which contains 22 as substring.

Together with 1249325279, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1249325281.

It is not a weakly prime, because it can be changed into another prime (1249325261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624662640 + 624662641.

It is an arithmetic number, because the mean of its divisors is an integer number (624662641).

Almost surely, 2^1249325281 is an apocalyptic number.

It is an amenable number.

1249325281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249325281 is an equidigital number, since it uses as much as digits as its factorization.

1249325281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 1249325281 is about 35345.7958037445. The cubic root of 1249325281 is about 1077.0234917301.

The spelling of 1249325281 in words is "one billion, two hundred forty-nine million, three hundred twenty-five thousand, two hundred eighty-one".