1226278573 has 8 divisors (see below), whose sum is σ = 1321390616. Its totient is φ = 1131278400.

The previous prime is 1226278567. The next prime is 1226278583. The reversal of 1226278573 is 3758726221.

It can be written as a sum of positive squares in 4 ways, for example, as 321592489 + 904686084 = 17933^2 + 30078^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1226278573 - 2⁵ = 1226278541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226278583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4458 + ... + 49723.

It is an arithmetic number, because the mean of its divisors is an integer number (165173827).

Almost surely, 2^1226278573 is an apocalyptic number.

1226278573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1226278573 is a deficient number, since it is larger than the sum of its proper divisors (95112043).

1226278573 is a wasteful number, since it uses less digits than its factorization.

1226278573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55935.

The product of its digits is 282240, while the sum is 43.

The square root of 1226278573 is about 35018.2605650252. The cubic root of 1226278573 is about 1070.3596115628.

The spelling of 1226278573 in words is "one billion, two hundred twenty-six million, two hundred seventy-eight thousand, five hundred seventy-three".