111271649 has 2 divisors, whose sum is σ = 111271650. Its totient is φ = 111271648.

The previous prime is 111271609. The next prime is 111271687. The reversal of 111271649 is 946172111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102657424 + 8614225 = 10132^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 111271649 - 2⁸ = 111271393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111271609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55635824 + 55635825.

It is an arithmetic number, because the mean of its divisors is an integer number (55635825).

Almost surely, 2^111271649 is an apocalyptic number.

It is an amenable number.

111271649 is a deficient number, since it is larger than the sum of its proper divisors (1).

111271649 is an equidigital number, since it uses as much as digits as its factorization.

111271649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 32.

The square root of 111271649 is about 10548.5377659655. The cubic root of 111271649 is about 480.9812810491.

The spelling of 111271649 in words is "one hundred eleven million, two hundred seventy-one thousand, six hundred forty-nine".