1226350509 has 4 divisors (see below), whose sum is σ = 1635134016. Its totient is φ = 817567004.

The previous prime is 1226350493. The next prime is 1226350523. The reversal of 1226350509 is 9050536221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1226350509 - 2⁴ = 1226350493 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1226350509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226350529) 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, 204391749 + ... + 204391754.

It is an arithmetic number, because the mean of its divisors is an integer number (408783504).

Almost surely, 2^1226350509 is an apocalyptic number.

It is an amenable number.

1226350509 is a deficient number, since it is larger than the sum of its proper divisors (408783507).

1226350509 is an equidigital number, since it uses as much as digits as its factorization.

1226350509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408783506.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 1226350509 is about 35019.2876712248. The cubic root of 1226350509 is about 1070.3805409789.

The spelling of 1226350509 in words is "one billion, two hundred twenty-six million, three hundred fifty thousand, five hundred nine".