1197256961 has 2 divisors, whose sum is σ = 1197256962. Its totient is φ = 1197256960.

The previous prime is 1197256933. The next prime is 1197256987. The reversal of 1197256961 is 1696527911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1148871025 + 48385936 = 33895^2 + 6956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197256961 - 2¹⁸ = 1196994817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1197256661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598628480 + 598628481.

It is an arithmetic number, because the mean of its divisors is an integer number (598628481).

Almost surely, 2^1197256961 is an apocalyptic number.

It is an amenable number.

1197256961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197256961 is an equidigital number, since it uses as much as digits as its factorization.

1197256961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 47.

The square root of 1197256961 is about 34601.4011421503. The cubic root of 1197256961 is about 1061.8482531388.

The spelling of 1197256961 in words is "one billion, one hundred ninety-seven million, two hundred fifty-six thousand, nine hundred sixty-one".