1287227822 has 16 divisors (see below), whose sum is σ = 1973071872. Its totient is φ = 629553240.

The previous prime is 1287227819. The next prime is 1287227831. The reversal of 1287227822 is 2287227821.

It is a self number, because there is not a number n which added to its sum of digits gives 1287227822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232547 + ... + 238017.

It is an arithmetic number, because the mean of its divisors is an integer number (123316992).

Almost surely, 2^1287227822 is an apocalyptic number.

1287227822 is a deficient number, since it is larger than the sum of its proper divisors (685844050).

1287227822 is a wasteful number, since it uses less digits than its factorization.

1287227822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023.

The product of its digits is 100352, while the sum is 41.

The square root of 1287227822 is about 35877.9573275849. The cubic root of 1287227822 is about 1087.8068918872.

Subtracting 1287227822 from its reverse (2287227821), we obtain a palindrome (999999999).

The spelling of 1287227822 in words is "one billion, two hundred eighty-seven million, two hundred twenty-seven thousand, eight hundred twenty-two".