1240145204423 has 2 divisors, whose sum is σ = 1240145204424. Its totient is φ = 1240145204422.

The previous prime is 1240145204401. The next prime is 1240145204497. The reversal of 1240145204423 is 3244025410421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240145204423 - 2¹⁶ = 1240145138887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240145204423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240145201423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620072602211 + 620072602212.

It is an arithmetic number, because the mean of its divisors is an integer number (620072602212).

Almost surely, 2^{1240145204423} is an apocalyptic number.

1240145204423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240145204423 is an equidigital number, since it uses as much as digits as its factorization.

1240145204423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 32.

The spelling of 1240145204423 in words is "one trillion, two hundred forty billion, one hundred forty-five million, two hundred four thousand, four hundred twenty-three".