111067561 has 4 divisors (see below), whose sum is σ = 121164624. Its totient is φ = 100970500.

The previous prime is 111067493. The next prime is 111067589. The reversal of 111067561 is 165760111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111067561 - 2¹³ = 111059369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111067591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5048515 + ... + 5048536.

It is an arithmetic number, because the mean of its divisors is an integer number (30291156).

Almost surely, 2^111067561 is an apocalyptic number.

111067561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111067561 is a deficient number, since it is larger than the sum of its proper divisors (10097063).

111067561 is a wasteful number, since it uses less digits than its factorization.

111067561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10097062.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 111067561 is about 10538.8595682835. The cubic root of 111067561 is about 480.6870384321.

It can be divided in two parts, 111067 and 561, that added together give a triangular number (111628 = T₄₇₂).

The spelling of 111067561 in words is "one hundred eleven million, sixty-seven thousand, five hundred sixty-one".