1240254403 has 2 divisors, whose sum is σ = 1240254404. Its totient is φ = 1240254402.

The previous prime is 1240254401. The next prime is 1240254437. The reversal of 1240254403 is 3044520421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240254403 - 2¹ = 1240254401 is a prime.

Together with 1240254401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1240254401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620127201 + 620127202.

It is an arithmetic number, because the mean of its divisors is an integer number (620127202).

Almost surely, 2^1240254403 is an apocalyptic number.

1240254403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240254403 is an equidigital number, since it uses as much as digits as its factorization.

1240254403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1240254403 is about 35217.2458179228. The cubic root of 1240254403 is about 1074.4105376246.

Adding to 1240254403 its reverse (3044520421), we get a palindrome (4284774824).

The spelling of 1240254403 in words is "one billion, two hundred forty million, two hundred fifty-four thousand, four hundred three".