1212750857 has 2 divisors, whose sum is σ = 1212750858. Its totient is φ = 1212750856.

The previous prime is 1212750793. The next prime is 1212750901. The reversal of 1212750857 is 7580572121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1176558601 + 36192256 = 34301^2 + 6016^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212750857 - 2⁶ = 1212750793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212750857.

It is not a weakly prime, because it can be changed into another prime (1212759857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606375428 + 606375429.

It is an arithmetic number, because the mean of its divisors is an integer number (606375429).

Almost surely, 2^1212750857 is an apocalyptic number.

It is an amenable number.

1212750857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212750857 is an equidigital number, since it uses as much as digits as its factorization.

1212750857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39200, while the sum is 38.

The square root of 1212750857 is about 34824.5726032639. The cubic root of 1212750857 is about 1066.4091515834.

The spelling of 1212750857 in words is "one billion, two hundred twelve million, seven hundred fifty thousand, eight hundred fifty-seven".