1226511145 has 16 divisors (see below), whose sum is σ = 1507841280. Its totient is φ = 957245184.

The previous prime is 1226511137. The next prime is 1226511197. The reversal of 1226511145 is 5411156221.

It is a cyclic number.

It is not a de Polignac number, because 1226511145 - 2³ = 1226511137 is a prime.

It is a super-2 number, since 2×1226511145² = 3008659177618422050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207136 + ... + 212974.

It is an arithmetic number, because the mean of its divisors is an integer number (94240080).

Almost surely, 2^1226511145 is an apocalyptic number.

It is an amenable number.

1226511145 is a deficient number, since it is larger than the sum of its proper divisors (281330135).

1226511145 is an equidigital number, since it uses as much as digits as its factorization.

1226511145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6864.

The product of its digits is 2400, while the sum is 28.

The square root of 1226511145 is about 35021.5811322105. The cubic root of 1226511145 is about 1070.4272742580.

Adding to 1226511145 its reverse (5411156221), we get a palindrome (6637667366).

The spelling of 1226511145 in words is "one billion, two hundred twenty-six million, five hundred eleven thousand, one hundred forty-five".