1226400001 has 2 divisors, whose sum is σ = 1226400002. Its totient is φ = 1226400000.

The previous prime is 1226399981. The next prime is 1226400017. The reversal of 1226400001 is 1000046221.

It is an a-pointer prime, because the next prime (1226400017) can be obtained adding 1226400001 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1222201600 + 4198401 = 34960^2 + 2049^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226400001 - 2¹⁹ = 1225875713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226400031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613200000 + 613200001.

It is an arithmetic number, because the mean of its divisors is an integer number (613200001).

Almost surely, 2^1226400001 is an apocalyptic number.

It is an amenable number.

1226400001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226400001 is an equidigital number, since it uses as much as digits as its factorization.

1226400001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1226400001 is about 35019.9943032548. The cubic root of 1226400001 is about 1070.3949399512.

Adding to 1226400001 its reverse (1000046221), we get a palindrome (2226446222).

The spelling of 1226400001 in words is "one billion, two hundred twenty-six million, four hundred thousand, one".