1111556249 has 2 divisors, whose sum is σ = 1111556250. Its totient is φ = 1111556248.

The previous prime is 1111556239. The next prime is 1111556267. The reversal of 1111556249 is 9426551111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768121225 + 343435024 = 27715^2 + 18532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111556249 - 2²⁸ = 843120793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111556209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555778124 + 555778125.

It is an arithmetic number, because the mean of its divisors is an integer number (555778125).

Almost surely, 2^1111556249 is an apocalyptic number.

It is an amenable number.

1111556249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111556249 is an equidigital number, since it uses as much as digits as its factorization.

1111556249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 35.

The square root of 1111556249 is about 33340.0097330520. The cubic root of 1111556249 is about 1035.8824648765.

The spelling of 1111556249 in words is "one billion, one hundred eleven million, five hundred fifty-six thousand, two hundred forty-nine".