1310421187 has 2 divisors, whose sum is σ = 1310421188. Its totient is φ = 1310421186.

The previous prime is 1310421109. The next prime is 1310421191. The reversal of 1310421187 is 7811240131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1310421187 - 2¹¹ = 1310419139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1310421107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655210593 + 655210594.

It is an arithmetic number, because the mean of its divisors is an integer number (655210594).

Almost surely, 2^1310421187 is an apocalyptic number.

1310421187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310421187 is an equidigital number, since it uses as much as digits as its factorization.

1310421187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1310421187 is about 36199.7401510011. The cubic root of 1310421187 is about 1094.3014349947.

The spelling of 1310421187 in words is "one billion, three hundred ten million, four hundred twenty-one thousand, one hundred eighty-seven".