1117561005 has 96 divisors (see below), whose sum is σ = 2215968768. Its totient is φ = 516067200.

The previous prime is 1117560953. The next prime is 1117561009. The reversal of 1117561005 is 5001657111.

It is a happy number.

It is not a de Polignac number, because 1117561005 - 2²² = 1113366701 is a prime.

It is a super-2 number, since 2×1117561005² = 2497885199793220050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1117561005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117561009) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 1027572 + ... + 1028658.

It is an arithmetic number, because the mean of its divisors is an integer number (23083008).

Almost surely, 2^1117561005 is an apocalyptic number.

1117561005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1117561005 is a deficient number, since it is larger than the sum of its proper divisors (1098407763).

1117561005 is a wasteful number, since it uses less digits than its factorization.

1117561005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

The square root of 1117561005 is about 33429.9417438918. The cubic root of 1117561005 is about 1037.7444351728.

The spelling of 1117561005 in words is "one billion, one hundred seventeen million, five hundred sixty-one thousand, five".