1287942225247 has 8 divisors (see below), whose sum is σ = 1335593725856. Its totient is φ = 1240966632672.

The previous prime is 1287942225223. The next prime is 1287942225301. The reversal of 1287942225247 is 7425222497821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287942225247 is a prime.

It is a super-2 number, since 2×1287942225247² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287942225217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168973128 + ... + 168980749.

It is an arithmetic number, because the mean of its divisors is an integer number (166949215732).

Almost surely, 2^{1287942225247} is an apocalyptic number.

1287942225247 is a deficient number, since it is larger than the sum of its proper divisors (47651500609).

1287942225247 is a wasteful number, since it uses less digits than its factorization.

1287942225247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337954017.

The product of its digits is 9031680, while the sum is 55.

The spelling of 1287942225247 in words is "one trillion, two hundred eighty-seven billion, nine hundred forty-two million, two hundred twenty-five thousand, two hundred forty-seven".