1245544481 has 2 divisors, whose sum is σ = 1245544482. Its totient is φ = 1245544480.

The previous prime is 1245544459. The next prime is 1245544523. The reversal of 1245544481 is 1844455421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847741456 + 397803025 = 29116^2 + 19945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245544481 - 2¹⁰ = 1245543457 is a prime.

It is a super-2 number, since 2×1245544481² = 3102762108299118722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1245544081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622772240 + 622772241.

It is an arithmetic number, because the mean of its divisors is an integer number (622772241).

Almost surely, 2^1245544481 is an apocalyptic number.

It is an amenable number.

1245544481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245544481 is an equidigital number, since it uses as much as digits as its factorization.

1245544481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102400, while the sum is 38.

The square root of 1245544481 is about 35292.2722561186. The cubic root of 1245544481 is about 1075.9359380262.

The spelling of 1245544481 in words is "one billion, two hundred forty-five million, five hundred forty-four thousand, four hundred eighty-one".