1296145973 has 2 divisors, whose sum is σ = 1296145974. Its totient is φ = 1296145972.

The previous prime is 1296145883. The next prime is 1296146017. The reversal of 1296145973 is 3795416921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 683979409 + 612166564 = 26153^2 + 24742^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296145973 - 2¹⁸ = 1295883829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296145073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648072986 + 648072987.

It is an arithmetic number, because the mean of its divisors is an integer number (648072987).

Almost surely, 2^1296145973 is an apocalyptic number.

It is an amenable number.

1296145973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296145973 is an equidigital number, since it uses as much as digits as its factorization.

1296145973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 1296145973 is about 36002.0273456926. The cubic root of 1296145973 is about 1090.3132878885.

The spelling of 1296145973 in words is "one billion, two hundred ninety-six million, one hundred forty-five thousand, nine hundred seventy-three".