1297820131 has 2 divisors, whose sum is σ = 1297820132. Its totient is φ = 1297820130.

The previous prime is 1297820129. The next prime is 1297820219. The reversal of 1297820131 is 1310287921.

It is a weak prime.

It is an emirp because it is prime and its reverse (1310287921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1297820131 - 2¹ = 1297820129 is a prime.

It is a super-2 number, since 2×1297820131² = 3368674184857714322, which contains 22 as substring.

Together with 1297820129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1297820101) 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, 648910065 + 648910066.

It is an arithmetic number, because the mean of its divisors is an integer number (648910066).

Almost surely, 2^1297820131 is an apocalyptic number.

1297820131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297820131 is an equidigital number, since it uses as much as digits as its factorization.

1297820131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 1297820131 is about 36025.2707276434. The cubic root of 1297820131 is about 1090.7825177983.

The spelling of 1297820131 in words is "one billion, two hundred ninety-seven million, eight hundred twenty thousand, one hundred thirty-one".