1287222376 has 64 divisors (see below), whose sum is σ = 2674244160. Its totient is φ = 576000000.

The previous prime is 1287222373. The next prime is 1287222407. The reversal of 1287222376 is 6732227821.

It is not an unprimeable number, because it can be changed into a prime (1287222373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2230600 + ... + 2231176.

It is an arithmetic number, because the mean of its divisors is an integer number (41785065).

Almost surely, 2^1287222376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287222376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337122080).

1287222376 is an abundant number, since it is smaller than the sum of its proper divisors (1387021784).

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

1287222376 is a wasteful number, since it uses less digits than its factorization.

1287222376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 942 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 1287222376 is about 35877.8814313220. The cubic root of 1287222376 is about 1087.8053577882.

Subtracting 1287222376 from its reverse (6732227821), we obtain a palindrome (5445005445).

The spelling of 1287222376 in words is "one billion, two hundred eighty-seven million, two hundred twenty-two thousand, three hundred seventy-six".