1297600105 has 4 divisors (see below), whose sum is σ = 1557120132. Its totient is φ = 1038080080.

The previous prime is 1297600081. The next prime is 1297600127. The reversal of 1297600105 is 5010067921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5010067921 = 61 ⋅82132261.

It can be written as a sum of positive squares in 2 ways, for example, as 1012766976 + 284833129 = 31824^2 + 16877^2 .

It is not a de Polignac number, because 1297600105 - 2²⁷ = 1163382377 is a prime.

It is a super-2 number, since 2×1297600105² = 3367532064992022050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129760006 + ... + 129760015.

It is an arithmetic number, because the mean of its divisors is an integer number (389280033).

Almost surely, 2^1297600105 is an apocalyptic number.

It is an amenable number.

1297600105 is a deficient number, since it is larger than the sum of its proper divisors (259520027).

1297600105 is an equidigital number, since it uses as much as digits as its factorization.

1297600105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259520026.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1297600105 is about 36022.2168251761. The cubic root of 1297600105 is about 1090.7208723584.

The spelling of 1297600105 in words is "one billion, two hundred ninety-seven million, six hundred thousand, one hundred five".