42391334 has 4 divisors (see below), whose sum is σ = 63587004. Its totient is φ = 21195666.

The previous prime is 42391309. The next prime is 42391339. The reversal of 42391334 is 43319324.

42391334 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 junction number, because it is equal to n+sod(n) for n = 42391297 and 42391306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42391339) 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, 10597832 + ... + 10597835.

It is an arithmetic number, because the mean of its divisors is an integer number (15896751).

Almost surely, 2^42391334 is an apocalyptic number.

42391334 is a deficient number, since it is larger than the sum of its proper divisors (21195670).

42391334 is a wasteful number, since it uses less digits than its factorization.

42391334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21195669.

The product of its digits is 7776, while the sum is 29.

The square root of 42391334 is about 6510.8627692496. The cubic root of 42391334 is about 348.6789218935.

The spelling of 42391334 in words is "forty-two million, three hundred ninety-one thousand, three hundred thirty-four".