1442340391 has 2 divisors, whose sum is σ = 1442340392. Its totient is φ = 1442340390.

The previous prime is 1442340377. The next prime is 1442340439. The reversal of 1442340391 is 1930432441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1442340391 - 2⁵ = 1442340359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1442340191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721170195 + 721170196.

It is an arithmetic number, because the mean of its divisors is an integer number (721170196).

Almost surely, 2^1442340391 is an apocalyptic number.

1442340391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442340391 is an equidigital number, since it uses as much as digits as its factorization.

1442340391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1442340391 is about 37978.1567614859. The cubic root of 1442340391 is about 1129.8546791481.

The spelling of 1442340391 in words is "one billion, four hundred forty-two million, three hundred forty thousand, three hundred ninety-one".