1111125779 has 4 divisors (see below), whose sum is σ = 1111278120. Its totient is φ = 1110973440.

The previous prime is 1111125767. The next prime is 1111125781. The reversal of 1111125779 is 9775211111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111125779 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1111125709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64649 + ... + 80010.

It is an arithmetic number, because the mean of its divisors is an integer number (277819530).

Almost surely, 2^1111125779 is an apocalyptic number.

1111125779 is a deficient number, since it is larger than the sum of its proper divisors (152341).

1111125779 is an equidigital number, since it uses as much as digits as its factorization.

1111125779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152340.

The product of its digits is 4410, while the sum is 35.

The square root of 1111125779 is about 33333.5533509406. The cubic root of 1111125779 is about 1035.7487262853.

The spelling of 1111125779 in words is "one billion, one hundred eleven million, one hundred twenty-five thousand, seven hundred seventy-nine".