42145244387 has 2 divisors, whose sum is σ = 42145244388. Its totient is φ = 42145244386.

The previous prime is 42145244333. The next prime is 42145244419. The reversal of 42145244387 is 78344254124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42145244387 - 2⁸ = 42145244131 is a prime.

It is not a weakly prime, because it can be changed into another prime (42145244587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21072622193 + 21072622194.

It is an arithmetic number, because the mean of its divisors is an integer number (21072622194).

Almost surely, 2^42145244387 is an apocalyptic number.

42145244387 is a deficient number, since it is larger than the sum of its proper divisors (1).

42145244387 is an equidigital number, since it uses as much as digits as its factorization.

42145244387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 860160, while the sum is 44.

The spelling of 42145244387 in words is "forty-two billion, one hundred forty-five million, two hundred forty-four thousand, three hundred eighty-seven".