1226807545 has 4 divisors (see below), whose sum is σ = 1472169060. Its totient is φ = 981446032.

The previous prime is 1226807531. The next prime is 1226807611. The reversal of 1226807545 is 5457086221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5457086221 = 167 ⋅32677163.

It can be written as a sum of positive squares in 2 ways, for example, as 934158096 + 292649449 = 30564^2 + 17107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226807545 - 2⁵ = 1226807513 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1226807498 and 1226807507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122680750 + ... + 122680759.

It is an arithmetic number, because the mean of its divisors is an integer number (368042265).

Almost surely, 2^1226807545 is an apocalyptic number.

It is an amenable number.

1226807545 is a deficient number, since it is larger than the sum of its proper divisors (245361515).

1226807545 is an equidigital number, since it uses as much as digits as its factorization.

1226807545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245361514.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 1226807545 is about 35025.8125530301. The cubic root of 1226807545 is about 1070.5134941811.

The spelling of 1226807545 in words is "one billion, two hundred twenty-six million, eight hundred seven thousand, five hundred forty-five".