1230128297 has 4 divisors (see below), whose sum is σ = 1283612160. Its totient is φ = 1176644436.

The previous prime is 1230128213. The next prime is 1230128299. The reversal of 1230128297 is 7928210321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1230128297 - 2²⁰ = 1229079721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230128299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26741897 + ... + 26741942.

It is an arithmetic number, because the mean of its divisors is an integer number (320903040).

Almost surely, 2^1230128297 is an apocalyptic number.

It is an amenable number.

1230128297 is a deficient number, since it is larger than the sum of its proper divisors (53483863).

1230128297 is an equidigital number, since it uses as much as digits as its factorization.

1230128297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53483862.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1230128297 is about 35073.1848710664. The cubic root of 1230128297 is about 1071.4785211600.

The spelling of 1230128297 in words is "one billion, two hundred thirty million, one hundred twenty-eight thousand, two hundred ninety-seven".