1121399727 has 16 divisors (see below), whose sum is σ = 1711852800. Its totient is φ = 639654912.

The previous prime is 1121399723. The next prime is 1121399759. The reversal of 1121399727 is 7279931211.

It is a happy number.

It is not a de Polignac number, because 1121399727 - 2² = 1121399723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121399723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35602 + ... + 59247.

It is an arithmetic number, because the mean of its divisors is an integer number (106990800).

Almost surely, 2^1121399727 is an apocalyptic number.

1121399727 is a deficient number, since it is larger than the sum of its proper divisors (590453073).

1121399727 is an equidigital number, since it uses as much as digits as its factorization.

1121399727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95422.

The product of its digits is 47628, while the sum is 42.

The square root of 1121399727 is about 33487.3069535309. The cubic root of 1121399727 is about 1038.9312637344.

The spelling of 1121399727 in words is "one billion, one hundred twenty-one million, three hundred ninety-nine thousand, seven hundred twenty-seven".