1297157357 has 2 divisors, whose sum is σ = 1297157358. Its totient is φ = 1297157356.

The previous prime is 1297157353. The next prime is 1297157363. The reversal of 1297157357 is 7537517921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159470601 + 137686756 = 34051^2 + 11734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297157357 - 2² = 1297157353 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297157353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648578678 + 648578679.

It is an arithmetic number, because the mean of its divisors is an integer number (648578679).

Almost surely, 2^1297157357 is an apocalyptic number.

It is an amenable number.

1297157357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297157357 is an equidigital number, since it uses as much as digits as its factorization.

1297157357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 463050, while the sum is 47.

The square root of 1297157357 is about 36016.0708156789. The cubic root of 1297157357 is about 1090.5968050083.

The spelling of 1297157357 in words is "one billion, two hundred ninety-seven million, one hundred fifty-seven thousand, three hundred fifty-seven".