1226578873 has 4 divisors (see below), whose sum is σ = 1320931108. Its totient is φ = 1132226640.

The previous prime is 1226578813. The next prime is 1226578901. The reversal of 1226578873 is 3788756221.

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 818417664 + 408161209 = 28608^2 + 20203^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226578873 - 2⁹ = 1226578361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226578813) 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, 47176098 + ... + 47176123.

It is an arithmetic number, because the mean of its divisors is an integer number (330232777).

Almost surely, 2^1226578873 is an apocalyptic number.

1226578873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1226578873 is a deficient number, since it is larger than the sum of its proper divisors (94352235).

1226578873 is an equidigital number, since it uses as much as digits as its factorization.

1226578873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94352234.

The product of its digits is 1128960, while the sum is 49.

The square root of 1226578873 is about 35022.5480654963. The cubic root of 1226578873 is about 1070.4469769092.

The spelling of 1226578873 in words is "one billion, two hundred twenty-six million, five hundred seventy-eight thousand, eight hundred seventy-three".