112561661 has 2 divisors, whose sum is σ = 112561662. Its totient is φ = 112561660.

The previous prime is 112561639. The next prime is 112561699. The reversal of 112561661 is 166165211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104755225 + 7806436 = 10235^2 + 2794^2 .

It is a cyclic number.

It is not a de Polignac number, because 112561661 - 2⁶ = 112561597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112567661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56280830 + 56280831.

It is an arithmetic number, because the mean of its divisors is an integer number (56280831).

Almost surely, 2^112561661 is an apocalyptic number.

It is an amenable number.

112561661 is a deficient number, since it is larger than the sum of its proper divisors (1).

112561661 is an equidigital number, since it uses as much as digits as its factorization.

112561661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 112561661 is about 10609.5080470303. The cubic root of 112561661 is about 482.8328732919.

The spelling of 112561661 in words is "one hundred twelve million, five hundred sixty-one thousand, six hundred sixty-one".