1287230873 has 2 divisors, whose sum is σ = 1287230874. Its totient is φ = 1287230872.

The previous prime is 1287230869. The next prime is 1287230891. The reversal of 1287230873 is 3780327821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646786624 + 640444249 = 25432^2 + 25307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287230873 - 2² = 1287230869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1287230873.

It is not a weakly prime, because it can be changed into another prime (1287230173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643615436 + 643615437.

It is an arithmetic number, because the mean of its divisors is an integer number (643615437).

Almost surely, 2^1287230873 is an apocalyptic number.

It is an amenable number.

1287230873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287230873 is an equidigital number, since it uses as much as digits as its factorization.

1287230873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 1287230873 is about 35877.9998467027. Note that the first 3 decimals coincide. The cubic root of 1287230873 is about 1087.8077513300.

The spelling of 1287230873 in words is "one billion, two hundred eighty-seven million, two hundred thirty thousand, eight hundred seventy-three".