111952721 has 2 divisors, whose sum is σ = 111952722. Its totient is φ = 111952720.

The previous prime is 111952703. The next prime is 111952739. The reversal of 111952721 is 127259111.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (111952703) and next prime (111952739).

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 1597696 = 10505^2 + 1264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111952721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111952781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55976360 + 55976361.

It is an arithmetic number, because the mean of its divisors is an integer number (55976361).

Almost surely, 2^111952721 is an apocalyptic number.

It is an amenable number.

111952721 is a deficient number, since it is larger than the sum of its proper divisors (1).

111952721 is an equidigital number, since it uses as much as digits as its factorization.

111952721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 29.

The square root of 111952721 is about 10580.7712856861. The cubic root of 111952721 is about 481.9606164340.

The spelling of 111952721 in words is "one hundred eleven million, nine hundred fifty-two thousand, seven hundred twenty-one".