1243453481 has 2 divisors, whose sum is σ = 1243453482. Its totient is φ = 1243453480.

The previous prime is 1243453451. The next prime is 1243453483. The reversal of 1243453481 is 1843543421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1115560000 + 127893481 = 33400^2 + 11309^2 .

It is an emirp because it is prime and its reverse (1843543421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243453481 is a prime.

It is a super-2 number, since 2×1243453481² = 3092353118822034722, which contains 22 as substring.

Together with 1243453483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1243453483) 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, 621726740 + 621726741.

It is an arithmetic number, because the mean of its divisors is an integer number (621726741).

Almost surely, 2^1243453481 is an apocalyptic number.

It is an amenable number.

1243453481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243453481 is an equidigital number, since it uses as much as digits as its factorization.

1243453481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 35.

The square root of 1243453481 is about 35262.6357636522. The cubic root of 1243453481 is about 1075.3335128159. Note that the first 3 decimals are identical.

The spelling of 1243453481 in words is "one billion, two hundred forty-three million, four hundred fifty-three thousand, four hundred eighty-one".