1251312253 has 2 divisors, whose sum is σ = 1251312254. Its totient is φ = 1251312252.

The previous prime is 1251312239. The next prime is 1251312259. The reversal of 1251312253 is 3522131521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210900804 + 40411449 = 34798^2 + 6357^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251312253 - 2⁵ = 1251312221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251312259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625656126 + 625656127.

It is an arithmetic number, because the mean of its divisors is an integer number (625656127).

Almost surely, 2^1251312253 is an apocalyptic number.

It is an amenable number.

1251312253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251312253 is an equidigital number, since it uses as much as digits as its factorization.

1251312253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 1251312253 is about 35373.8922512070. The cubic root of 1251312253 is about 1077.5941683014.

Adding to 1251312253 its reverse (3522131521), we get a palindrome (4773443774).

The spelling of 1251312253 in words is "one billion, two hundred fifty-one million, three hundred twelve thousand, two hundred fifty-three".