1297681195 has 4 divisors (see below), whose sum is σ = 1557217440. Its totient is φ = 1038144952.

The previous prime is 1297681181. The next prime is 1297681199. The reversal of 1297681195 is 5911867921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1297681195 - 2⁵ = 1297681163 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1297681199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129768115 + ... + 129768124.

It is an arithmetic number, because the mean of its divisors is an integer number (389304360).

Almost surely, 2^1297681195 is an apocalyptic number.

1297681195 is a deficient number, since it is larger than the sum of its proper divisors (259536245).

1297681195 is an equidigital number, since it uses as much as digits as its factorization.

1297681195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259536244.

The product of its digits is 272160, while the sum is 49.

The square root of 1297681195 is about 36023.3423629735. The cubic root of 1297681195 is about 1090.7435924329.

The spelling of 1297681195 in words is "one billion, two hundred ninety-seven million, six hundred eighty-one thousand, one hundred ninety-five".