111404621 has 4 divisors (see below), whose sum is σ = 117957852. Its totient is φ = 104851392.

The previous prime is 111404603. The next prime is 111404651. The reversal of 111404621 is 126404111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71588521 + 39816100 = 8461^2 + 6310^2 .

It is a cyclic number.

It is not a de Polignac number, because 111404621 - 2¹⁰ = 111403597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111404593 and 111404602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111404651) 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, 3276590 + ... + 3276623.

It is an arithmetic number, because the mean of its divisors is an integer number (29489463).

Almost surely, 2^111404621 is an apocalyptic number.

It is an amenable number.

111404621 is a deficient number, since it is larger than the sum of its proper divisors (6553231).

111404621 is an equidigital number, since it uses as much as digits as its factorization.

111404621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6553230.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 111404621 is about 10554.8387481761. The cubic root of 111404621 is about 481.1727990853.

Adding to 111404621 its reverse (126404111), we get a palindrome (237808732).

The spelling of 111404621 in words is "one hundred eleven million, four hundred four thousand, six hundred twenty-one".