1281067253 has 2 divisors, whose sum is σ = 1281067254. Its totient is φ = 1281067252.

The previous prime is 1281067247. The next prime is 1281067261. The reversal of 1281067253 is 3527601821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921851044 + 359216209 = 30362^2 + 18953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281067253 - 2²⁸ = 1012631797 is a prime.

It is a super-2 number, since 2×1281067253² = 3282266613417932018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281067213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640533626 + 640533627.

It is an arithmetic number, because the mean of its divisors is an integer number (640533627).

Almost surely, 2^1281067253 is an apocalyptic number.

It is an amenable number.

1281067253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281067253 is an equidigital number, since it uses as much as digits as its factorization.

1281067253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1281067253 is about 35791.9998463344. Note that the first 3 decimals coincide. The cubic root of 1281067253 is about 1086.0687305506.

The spelling of 1281067253 in words is "one billion, two hundred eighty-one million, sixty-seven thousand, two hundred fifty-three".