111642461 has 16 divisors (see below), whose sum is σ = 135020160. Its totient is φ = 90175680.

The previous prime is 111642457. The next prime is 111642463. The reversal of 111642461 is 164246111.

It is not a de Polignac number, because 111642461 - 2² = 111642457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111642461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111642463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24071 + ... + 28331.

It is an arithmetic number, because the mean of its divisors is an integer number (8438760).

Almost surely, 2^111642461 is an apocalyptic number.

It is an amenable number.

111642461 is a deficient number, since it is larger than the sum of its proper divisors (23377699).

111642461 is a wasteful number, since it uses less digits than its factorization.

111642461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484.

The product of its digits is 1152, while the sum is 26.

The square root of 111642461 is about 10566.0996114934. The cubic root of 111642461 is about 481.5149775705.

Adding to 111642461 its reverse (164246111), we get a palindrome (275888572).

The spelling of 111642461 in words is "one hundred eleven million, six hundred forty-two thousand, four hundred sixty-one".