1226400481 has 2 divisors, whose sum is σ = 1226400482. Its totient is φ = 1226400480.

The previous prime is 1226400437. The next prime is 1226400499. The reversal of 1226400481 is 1840046221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1226400400 + 81 = 35020^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226400481 - 2¹³ = 1226392289 is a prime.

It is a super-2 number, since 2×1226400481² = 3008116279594062722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1226400781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613200240 + 613200241.

It is an arithmetic number, because the mean of its divisors is an integer number (613200241).

Almost surely, 2^1226400481 is an apocalyptic number.

It is an amenable number.

1226400481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226400481 is an equidigital number, since it uses as much as digits as its factorization.

1226400481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 1226400481 is about 35020.0011564820. The cubic root of 1226400481 is about 1070.3950795983.

It can be divided in two parts, 12264004 and 81, that multiplied together give a square (993384324 = 31518²).

The spelling of 1226400481 in words is "one billion, two hundred twenty-six million, four hundred thousand, four hundred eighty-one".