1310987 has 2 divisors, whose sum is σ = 1310988. Its totient is φ = 1310986.

The previous prime is 1310963. The next prime is 1310993. The reversal of 1310987 is 7890131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1310987 - 2⁶ = 1310923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1310927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655493 + 655494.

It is an arithmetic number, because the mean of its divisors is an integer number (655494).

2^1310987 is an apocalyptic number.

1310987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310987 is an equidigital number, since it uses as much as digits as its factorization.

1310987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1310987 is about 1144.9834059933. The cubic root of 1310987 is about 109.4458911306.

The spelling of 1310987 in words is "one million, three hundred ten thousand, nine hundred eighty-seven".