111657061 has 4 divisors (see below), whose sum is σ = 113763852. Its totient is φ = 109550272.

The previous prime is 111657031. The next prime is 111657097. The reversal of 111657061 is 160756111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160756111 = 31 ⋅5185681.

It can be written as a sum of positive squares in 2 ways, for example, as 88472836 + 23184225 = 9406^2 + 4815^2 .

It is a cyclic number.

It is not a de Polignac number, because 111657061 - 2⁹ = 111656549 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 (111657031) 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, 1053316 + ... + 1053421.

It is an arithmetic number, because the mean of its divisors is an integer number (28440963).

Almost surely, 2^111657061 is an apocalyptic number.

It is an amenable number.

111657061 is a deficient number, since it is larger than the sum of its proper divisors (2106791).

111657061 is an equidigital number, since it uses as much as digits as its factorization.

111657061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106790.

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

The square root of 111657061 is about 10566.7904777184. The cubic root of 111657061 is about 481.5359666344.

The spelling of 111657061 in words is "one hundred eleven million, six hundred fifty-seven thousand, sixty-one".