1297200085 has 8 divisors (see below), whose sum is σ = 1559438136. Its totient is φ = 1035894720.

The previous prime is 1297200083. The next prime is 1297200089. The reversal of 1297200085 is 5800027921.

It can be written as a sum of positive squares in 4 ways, for example, as 51251281 + 1245948804 = 7159^2 + 35298^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1297200085 - 2¹ = 1297200083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1297200085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297200083) 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 in 7 ways as a sum of consecutive naturals, for example, 230106 + ... + 235675.

It is an arithmetic number, because the mean of its divisors is an integer number (194929767).

Almost surely, 2^1297200085 is an apocalyptic number.

It is an amenable number.

1297200085 is a deficient number, since it is larger than the sum of its proper divisors (262238051).

1297200085 is an equidigital number, since it uses as much as digits as its factorization.

1297200085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466343.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1297200085 is about 36016.6639904364. The cubic root of 1297200085 is about 1090.6087795279.

The spelling of 1297200085 in words is "one billion, two hundred ninety-seven million, two hundred thousand, eighty-five".