1131226345 has 16 divisors (see below), whose sum is σ = 1442241360. Its totient is φ = 850155264.

The previous prime is 1131226321. The next prime is 1131226373. The reversal of 1131226345 is 5436221311.

It can be written as a sum of positive squares in 8 ways, for example, as 250145856 + 881080489 = 15816^2 + 29683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131226345 - 2²¹ = 1129129193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100062 + ... + 110791.

It is an arithmetic number, because the mean of its divisors is an integer number (90140085).

Almost surely, 2^1131226345 is an apocalyptic number.

It is an amenable number.

1131226345 is a deficient number, since it is larger than the sum of its proper divisors (311015015).

1131226345 is a wasteful number, since it uses less digits than its factorization.

1131226345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210924.

The product of its digits is 4320, while the sum is 28.

The square root of 1131226345 is about 33633.7084633854. The cubic root of 1131226345 is about 1041.9570966453.

Adding to 1131226345 its reverse (5436221311), we get a palindrome (6567447656).

The spelling of 1131226345 in words is "one billion, one hundred thirty-one million, two hundred twenty-six thousand, three hundred forty-five".