113541721 has 2 divisors, whose sum is σ = 113541722. Its totient is φ = 113541720.

The previous prime is 113541713. The next prime is 113541767. The reversal of 113541721 is 127145311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87684496 + 25857225 = 9364^2 + 5085^2 .

It is a cyclic number.

It is not a de Polignac number, because 113541721 - 2³ = 113541713 is a prime.

It is not a weakly prime, because it can be changed into another prime (113541781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56770860 + 56770861.

It is an arithmetic number, because the mean of its divisors is an integer number (56770861).

Almost surely, 2^113541721 is an apocalyptic number.

It is an amenable number.

113541721 is a deficient number, since it is larger than the sum of its proper divisors (1).

113541721 is an equidigital number, since it uses as much as digits as its factorization.

113541721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 113541721 is about 10655.5957599751. The cubic root of 113541721 is about 484.2301471875.

The spelling of 113541721 in words is "one hundred thirteen million, five hundred forty-one thousand, seven hundred twenty-one".