111261061 has 4 divisors (see below), whose sum is σ = 112300992. Its totient is φ = 110221132.

The previous prime is 111261053. The next prime is 111261083. The reversal of 111261061 is 160162111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 160162111 = 1433 ⋅111767.

It is a cyclic number.

It is not a de Polignac number, because 111261061 - 2³ = 111261053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111261001) 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 3 ways as a sum of consecutive naturals, for example, 519805 + ... + 520018.

It is an arithmetic number, because the mean of its divisors is an integer number (28075248).

Almost surely, 2^111261061 is an apocalyptic number.

It is an amenable number.

111261061 is a deficient number, since it is larger than the sum of its proper divisors (1039931).

111261061 is a wasteful number, since it uses less digits than its factorization.

111261061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039930.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 111261061 is about 10548.0358835188. The cubic root of 111261061 is about 480.9660247180.

The spelling of 111261061 in words is "one hundred eleven million, two hundred sixty-one thousand, sixty-one".