1315287487 has 4 divisors (see below), whose sum is σ = 1316001456. Its totient is φ = 1314573520.

The previous prime is 1315287481. The next prime is 1315287541. The reversal of 1315287487 is 7847825131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315287487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315287481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354214 + ... + 357907.

It is an arithmetic number, because the mean of its divisors is an integer number (329000364).

Almost surely, 2^1315287487 is an apocalyptic number.

1315287487 is a deficient number, since it is larger than the sum of its proper divisors (713969).

1315287487 is an equidigital number, since it uses as much as digits as its factorization.

1315287487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713968.

The product of its digits is 376320, while the sum is 46.

The square root of 1315287487 is about 36266.8924364909. The cubic root of 1315287487 is about 1095.6543386550.

The spelling of 1315287487 in words is "one billion, three hundred fifteen million, two hundred eighty-seven thousand, four hundred eighty-seven".