1117721356 has 12 divisors (see below), whose sum is σ = 1961258992. Its totient is φ = 557361648.

The previous prime is 1117721347. The next prime is 1117721369. The reversal of 1117721356 is 6531277111.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373080 + ... + 376063.

Almost surely, 2^1117721356 is an apocalyptic number.

It is an amenable number.

1117721356 is a deficient number, since it is larger than the sum of its proper divisors (843537636).

1117721356 is a wasteful number, since it uses less digits than its factorization.

1117721356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749520 (or 749518 counting only the distinct ones).

The product of its digits is 8820, while the sum is 34.

The square root of 1117721356 is about 33432.3399719493. The cubic root of 1117721356 is about 1037.7940656923.

Adding to 1117721356 its reverse (6531277111), we get a palindrome (7648998467).

The spelling of 1117721356 in words is "one billion, one hundred seventeen million, seven hundred twenty-one thousand, three hundred fifty-six".