111561006 has 32 divisors (see below), whose sum is σ = 229109760. Its totient is φ = 36195264.

The previous prime is 111561001. The next prime is 111561011. The reversal of 111561006 is 600165111.

It is an interprime number because it is at equal distance from previous prime (111561001) and next prime (111561011).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111561001) 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 15 ways as a sum of consecutive naturals, for example, 98250 + ... + 99378.

It is an arithmetic number, because the mean of its divisors is an integer number (7159680).

Almost surely, 2^111561006 is an apocalyptic number.

111561006 is an abundant number, since it is smaller than the sum of its proper divisors (117548754).

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

111561006 is a wasteful number, since it uses less digits than its factorization.

111561006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 111561006 is about 10562.2443637704. The cubic root of 111561006 is about 481.3978436867.

The spelling of 111561006 in words is "one hundred eleven million, five hundred sixty-one thousand, six".