1226361145 has 4 divisors (see below), whose sum is σ = 1471633380. Its totient is φ = 981088912.

The previous prime is 1226361139. The next prime is 1226361163. The reversal of 1226361145 is 5411636221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205750336 + 1020610809 = 14344^2 + 31947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226361145 - 2⁹ = 1226360633 is a prime.

It is a super-2 number, since 2×1226361145² = 3007923315931422050, 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 3 ways as a sum of consecutive naturals, for example, 122636110 + ... + 122636119.

It is an arithmetic number, because the mean of its divisors is an integer number (367908345).

Almost surely, 2^1226361145 is an apocalyptic number.

It is an amenable number.

1226361145 is a deficient number, since it is larger than the sum of its proper divisors (245272235).

1226361145 is an equidigital number, since it uses as much as digits as its factorization.

1226361145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245272234.

The product of its digits is 8640, while the sum is 31.

The square root of 1226361145 is about 35019.4395300667. The cubic root of 1226361145 is about 1070.3836353999.

Adding to 1226361145 its reverse (5411636221), we get a palindrome (6637997366).

The spelling of 1226361145 in words is "one billion, two hundred twenty-six million, three hundred sixty-one thousand, one hundred forty-five".