1121611757 has 4 divisors (see below), whose sum is σ = 1281842016. Its totient is φ = 961381500.

The previous prime is 1121611723. The next prime is 1121611759. The reversal of 1121611757 is 7571161211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121611757 - 2⁶ = 1121611693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121611759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80115119 + ... + 80115132.

It is an arithmetic number, because the mean of its divisors is an integer number (320460504).

Almost surely, 2^1121611757 is an apocalyptic number.

It is an amenable number.

1121611757 is a deficient number, since it is larger than the sum of its proper divisors (160230259).

1121611757 is an equidigital number, since it uses as much as digits as its factorization.

1121611757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160230258.

The product of its digits is 2940, while the sum is 32.

The square root of 1121611757 is about 33490.4726302870. The cubic root of 1121611757 is about 1038.9967386668.

Adding to 1121611757 its reverse (7571161211), we get a palindrome (8692772968).

The spelling of 1121611757 in words is "one billion, one hundred twenty-one million, six hundred eleven thousand, seven hundred fifty-seven".