42145679 has 2 divisors, whose sum is σ = 42145680. Its totient is φ = 42145678.

The previous prime is 42145651. The next prime is 42145711. The reversal of 42145679 is 97654124.

42145679 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 42145679 - 2⁸ = 42145423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42145619) 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, 21072839 + 21072840.

It is an arithmetic number, because the mean of its divisors is an integer number (21072840).

Almost surely, 2^42145679 is an apocalyptic number.

42145679 is a deficient number, since it is larger than the sum of its proper divisors (1).

42145679 is an equidigital number, since it uses as much as digits as its factorization.

42145679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 42145679 is about 6491.9703480530. The cubic root of 42145679 is about 348.0040928527.

It can be divided in two parts, 42145 and 679, that added together give a palindrome (42824).

The spelling of 42145679 in words is "forty-two million, one hundred forty-five thousand, six hundred seventy-nine".