42248939 has 4 divisors (see below), whose sum is σ = 43611840. Its totient is φ = 40886040.

The previous prime is 42248929. The next prime is 42248971. The reversal of 42248939 is 93984224.

42248939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42248939 - 2¹² = 42244843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42248896 and 42248905.

It is not an unprimeable number, because it can be changed into a prime (42248929) 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 in 3 ways as a sum of consecutive naturals, for example, 681404 + ... + 681465.

It is an arithmetic number, because the mean of its divisors is an integer number (10902960).

Almost surely, 2^42248939 is an apocalyptic number.

42248939 is a deficient number, since it is larger than the sum of its proper divisors (1362901).

42248939 is a wasteful number, since it uses less digits than its factorization.

42248939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362900.

The product of its digits is 124416, while the sum is 41.

The square root of 42248939 is about 6499.9183841030. The cubic root of 42248939 is about 348.2880728925.

The spelling of 42248939 in words is "forty-two million, two hundred forty-eight thousand, nine hundred thirty-nine".