1131226235 has 4 divisors (see below), whose sum is σ = 1357471488. Its totient is φ = 904980984.

The previous prime is 1131226231. The next prime is 1131226247. The reversal of 1131226235 is 5326221311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5326221311 = 3547 ⋅1501613.

It is a cyclic number.

It is not a de Polignac number, because 1131226235 - 2² = 1131226231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131226231) 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, 113122619 + ... + 113122628.

It is an arithmetic number, because the mean of its divisors is an integer number (339367872).

Almost surely, 2^1131226235 is an apocalyptic number.

1131226235 is a deficient number, since it is larger than the sum of its proper divisors (226245253).

1131226235 is an equidigital number, since it uses as much as digits as its factorization.

1131226235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226245252.

The product of its digits is 2160, while the sum is 26.

The square root of 1131226235 is about 33633.7068281211. The cubic root of 1131226235 is about 1041.9570628722.

Adding to 1131226235 its reverse (5326221311), we get a palindrome (6457447546).

The spelling of 1131226235 in words is "one billion, one hundred thirty-one million, two hundred twenty-six thousand, two hundred thirty-five".