1274221788 has 24 divisors (see below), whose sum is σ = 3397924992. Its totient is φ = 364063344.

The previous prime is 1274221783. The next prime is 1274221829. The reversal of 1274221788 is 8871224721.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1274221783) 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, 7584570 + ... + 7584737.

It is an arithmetic number, because the mean of its divisors is an integer number (141580208).

Almost surely, 2^1274221788 is an apocalyptic number.

It is an amenable number.

1274221788 is an abundant number, since it is smaller than the sum of its proper divisors (2123703204).

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

1274221788 is a wasteful number, since it uses less digits than its factorization.

1274221788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15169321 (or 15169319 counting only the distinct ones).

The product of its digits is 100352, while the sum is 42.

The square root of 1274221788 is about 35696.2433317569. The cubic root of 1274221788 is about 1084.1307819587.

The spelling of 1274221788 in words is "one billion, two hundred seventy-four million, two hundred twenty-one thousand, seven hundred eighty-eight".