1123255651 has 4 divisors (see below), whose sum is σ = 1283720752. Its totient is φ = 962790552.

The previous prime is 1123255649. The next prime is 1123255673. The reversal of 1123255651 is 1565523211.

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 1123255651 - 2¹ = 1123255649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123255051) 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, 80232540 + ... + 80232553.

It is an arithmetic number, because the mean of its divisors is an integer number (320930188).

Almost surely, 2^1123255651 is an apocalyptic number.

1123255651 is a deficient number, since it is larger than the sum of its proper divisors (160465101).

1123255651 is an equidigital number, since it uses as much as digits as its factorization.

1123255651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160465100.

The product of its digits is 9000, while the sum is 31.

The square root of 1123255651 is about 33515.0063553627. The cubic root of 1123255651 is about 1039.5040938864.

Adding to 1123255651 its reverse (1565523211), we get a palindrome (2688778862).

The spelling of 1123255651 in words is "one billion, one hundred twenty-three million, two hundred fifty-five thousand, six hundred fifty-one".