42242929 has 4 divisors (see below), whose sum is σ = 42303220. Its totient is φ = 42182640.

The previous prime is 42242923. The next prime is 42242939. The reversal of 42242929 is 92924224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17472400 + 24770529 = 4180^2 + 4977^2 .

It is a cyclic number.

It is not a de Polignac number, because 42242929 - 2¹⁹ = 41718641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42242894 and 42242903.

It is not an unprimeable number, because it can be changed into a prime (42242923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29082 + ... + 30499.

It is an arithmetic number, because the mean of its divisors is an integer number (10575805).

It is a self-describing number.

Almost surely, 2^42242929 is an apocalyptic number.

It is an amenable number.

42242929 is a deficient number, since it is larger than the sum of its proper divisors (60291).

42242929 is an equidigital number, since it uses as much as digits as its factorization.

42242929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60290.

The product of its digits is 20736, while the sum is 34.

The square root of 42242929 is about 6499.4560541633. The cubic root of 42242929 is about 348.2715572069.

The spelling of 42242929 in words is "forty-two million, two hundred forty-two thousand, nine hundred twenty-nine".