42265387 has 2 divisors, whose sum is σ = 42265388. Its totient is φ = 42265386.

The previous prime is 42265381. The next prime is 42265397. The reversal of 42265387 is 78356224.

42265387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42265387 - 2¹¹ = 42263339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42265381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21132693 + 21132694.

It is an arithmetic number, because the mean of its divisors is an integer number (21132694).

Almost surely, 2^42265387 is an apocalyptic number.

42265387 is a deficient number, since it is larger than the sum of its proper divisors (1).

42265387 is an equidigital number, since it uses as much as digits as its factorization.

42265387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 42265387 is about 6501.1835076392. The cubic root of 42265387 is about 348.3332645518. Note that the first 3 decimals are identical.

It can be divided in two parts, 422653 and 87, that added together give a triangular number (422740 = T₉₁₉).

The spelling of 42265387 in words is "forty-two million, two hundred sixty-five thousand, three hundred eighty-seven".