1251696353 has 2 divisors, whose sum is σ = 1251696354. Its totient is φ = 1251696352.

The previous prime is 1251696301. The next prime is 1251696359. The reversal of 1251696353 is 3536961521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197644449 + 54051904 = 34607^2 + 7352^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251696353 - 2¹⁴ = 1251679969 is a prime.

It is a super-2 number, since 2×1251696353² = 3133487520227001218, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251696353.

It is not a weakly prime, because it can be changed into another prime (1251696359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625848176 + 625848177.

It is an arithmetic number, because the mean of its divisors is an integer number (625848177).

Almost surely, 2^1251696353 is an apocalyptic number.

It is an amenable number.

1251696353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251696353 is an equidigital number, since it uses as much as digits as its factorization.

1251696353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 41.

The square root of 1251696353 is about 35379.3209799171. The cubic root of 1251696353 is about 1077.7044156506.

The spelling of 1251696353 in words is "one billion, two hundred fifty-one million, six hundred ninety-six thousand, three hundred fifty-three".