1226578901 has 2 divisors, whose sum is σ = 1226578902. Its totient is φ = 1226578900.

The previous prime is 1226578813. The next prime is 1226578909. The reversal of 1226578901 is 1098756221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1133938276 + 92640625 = 33674^2 + 9625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1226578901 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226578909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613289450 + 613289451.

It is an arithmetic number, because the mean of its divisors is an integer number (613289451).

Almost surely, 2^1226578901 is an apocalyptic number.

It is an amenable number.

1226578901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226578901 is an equidigital number, since it uses as much as digits as its factorization.

1226578901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1226578901 is about 35022.5484652388. The cubic root of 1226578901 is about 1070.4469850545.

The spelling of 1226578901 in words is "one billion, two hundred twenty-six million, five hundred seventy-eight thousand, nine hundred one".