1121787995 has 4 divisors (see below), whose sum is σ = 1346145600. Its totient is φ = 897430392.

The previous prime is 1121787991. The next prime is 1121788009. The reversal of 1121787995 is 5997871211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1121787995 - 2² = 1121787991 is a prime.

It is a super-2 number, since 2×1121787995² = 2516816611452240050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121787991) 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, 112178795 + ... + 112178804.

It is an arithmetic number, because the mean of its divisors is an integer number (336536400).

Almost surely, 2^1121787995 is an apocalyptic number.

1121787995 is a deficient number, since it is larger than the sum of its proper divisors (224357605).

1121787995 is an equidigital number, since it uses as much as digits as its factorization.

1121787995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224357604.

The product of its digits is 317520, while the sum is 50.

The square root of 1121787995 is about 33493.1036931485. The cubic root of 1121787995 is about 1039.0511547385.

The spelling of 1121787995 in words is "one billion, one hundred twenty-one million, seven hundred eighty-seven thousand, nine hundred ninety-five".