1242112481 has 2 divisors, whose sum is σ = 1242112482. Its totient is φ = 1242112480.

The previous prime is 1242112477. The next prime is 1242112519. The reversal of 1242112481 is 1842112421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1008634081 + 233478400 = 31759^2 + 15280^2 .

It is an emirp because it is prime and its reverse (1842112421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242112481 - 2² = 1242112477 is a prime.

It is a super-2 number, since 2×1242112481² = 3085686830911950722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242112481.

It is not a weakly prime, because it can be changed into another prime (1242114481) 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, 621056240 + 621056241.

It is an arithmetic number, because the mean of its divisors is an integer number (621056241).

Almost surely, 2^1242112481 is an apocalyptic number.

It is an amenable number.

1242112481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242112481 is an equidigital number, since it uses as much as digits as its factorization.

1242112481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 26.

The square root of 1242112481 is about 35243.6161737129. The cubic root of 1242112481 is about 1074.9468099877.

The spelling of 1242112481 in words is "one billion, two hundred forty-two million, one hundred twelve thousand, four hundred eighty-one".