1287600253 has 2 divisors, whose sum is σ = 1287600254. Its totient is φ = 1287600252.

The previous prime is 1287600239. The next prime is 1287600269. The reversal of 1287600253 is 3520067821.

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., 766071684 + 521528569 = 27678^2 + 22837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287600253 - 2²⁹ = 750729341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287640253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643800126 + 643800127.

It is an arithmetic number, because the mean of its divisors is an integer number (643800127).

Almost surely, 2^1287600253 is an apocalyptic number.

It is an amenable number.

1287600253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287600253 is an equidigital number, since it uses as much as digits as its factorization.

1287600253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1287600253 is about 35883.1472003223. The cubic root of 1287600253 is about 1087.9117927539.

The spelling of 1287600253 in words is "one billion, two hundred eighty-seven million, six hundred thousand, two hundred fifty-three".