1287275448 has 32 divisors (see below), whose sum is σ = 3278912400. Its totient is φ = 420995328.

The previous prime is 1287275419. The next prime is 1287275449. The reversal of 1287275448 is 8445727821.

It is a junction number, because it is equal to n+sod(n) for n = 1287275397 and 1287275406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287275449) 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, 504733 + ... + 507276.

Almost surely, 2^1287275448 is an apocalyptic number.

It is an amenable number.

1287275448 is an abundant number, since it is smaller than the sum of its proper divisors (1991636952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287275448 is a wasteful number, since it uses less digits than its factorization.

1287275448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012071 (or 1012067 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 48.

The square root of 1287275448 is about 35878.6210437358. The cubic root of 1287275448 is about 1087.8203076040.

The spelling of 1287275448 in words is "one billion, two hundred eighty-seven million, two hundred seventy-five thousand, four hundred forty-eight".