112004561 has 4 divisors (see below), whose sum is σ = 112059300. Its totient is φ = 111949824.

The previous prime is 112004533. The next prime is 112004567. The reversal of 112004561 is 165400211.

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 73017025 + 38987536 = 8545^2 + 6244^2 .

It is a cyclic number.

It is not a de Polignac number, because 112004561 - 2¹⁸ = 111742417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112004567) 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, 24176 + ... + 28433.

It is an arithmetic number, because the mean of its divisors is an integer number (28014825).

Almost surely, 2^112004561 is an apocalyptic number.

It is an amenable number.

112004561 is a deficient number, since it is larger than the sum of its proper divisors (54739).

112004561 is an equidigital number, since it uses as much as digits as its factorization.

112004561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54738.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 112004561 is about 10583.2207290598. The cubic root of 112004561 is about 482.0349959956.

Adding to 112004561 its reverse (165400211), we get a palindrome (277404772).

The spelling of 112004561 in words is "one hundred twelve million, four thousand, five hundred sixty-one".