1287449417 has 8 divisors (see below), whose sum is σ = 1299688416. Its totient is φ = 1275251872.

The previous prime is 1287449413. The next prime is 1287449453. The reversal of 1287449417 is 7149447821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1287449417 - 2² = 1287449413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287449413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53918 + ... + 74040.

It is an arithmetic number, because the mean of its divisors is an integer number (162461052).

Almost surely, 2^1287449417 is an apocalyptic number.

It is an amenable number.

1287449417 is a deficient number, since it is larger than the sum of its proper divisors (12238999).

1287449417 is a wasteful number, since it uses less digits than its factorization.

1287449417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20727.

The product of its digits is 451584, while the sum is 47.

The square root of 1287449417 is about 35881.0453721739. The cubic root of 1287449417 is about 1087.8693099334.

The spelling of 1287449417 in words is "one billion, two hundred eighty-seven million, four hundred forty-nine thousand, four hundred seventeen".