240142439 has 2 divisors, whose sum is σ = 240142440. Its totient is φ = 240142438.

The previous prime is 240142433. The next prime is 240142451. The reversal of 240142439 is 934241042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240142439 - 2⁴ = 240142423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240142433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120071219 + 120071220.

It is an arithmetic number, because the mean of its divisors is an integer number (120071220).

Almost surely, 2^240142439 is an apocalyptic number.

240142439 is a deficient number, since it is larger than the sum of its proper divisors (1).

240142439 is an equidigital number, since it uses as much as digits as its factorization.

240142439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 240142439 is about 15496.5299018845. The cubic root of 240142439 is about 621.5694188466.

The spelling of 240142439 in words is "two hundred forty million, one hundred forty-two thousand, four hundred thirty-nine".