1260242987 has 2 divisors, whose sum is σ = 1260242988. Its totient is φ = 1260242986.

The previous prime is 1260242939. The next prime is 1260242989. The reversal of 1260242987 is 7892420621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1260242987 - 2⁶ = 1260242923 is a prime.

Together with 1260242989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1260242989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630121493 + 630121494.

It is an arithmetic number, because the mean of its divisors is an integer number (630121494).

Almost surely, 2^1260242987 is an apocalyptic number.

1260242987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260242987 is an equidigital number, since it uses as much as digits as its factorization.

1260242987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 1260242987 is about 35499.9012252147. The cubic root of 1260242987 is about 1080.1517239401.

The spelling of 1260242987 in words is "one billion, two hundred sixty million, two hundred forty-two thousand, nine hundred eighty-seven".