42291742 has 4 divisors (see below), whose sum is σ = 63437616. Its totient is φ = 21145870.

The previous prime is 42291707. The next prime is 42291749. The reversal of 42291742 is 24719224.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42291749) 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 as a sum of consecutive naturals, namely, 10572934 + ... + 10572937.

It is an arithmetic number, because the mean of its divisors is an integer number (15859404).

Almost surely, 2^42291742 is an apocalyptic number.

42291742 is a deficient number, since it is larger than the sum of its proper divisors (21145874).

42291742 is a wasteful number, since it uses less digits than its factorization.

42291742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21145873.

The product of its digits is 8064, while the sum is 31.

The square root of 42291742 is about 6503.2101303895. The cubic root of 42291742 is about 348.4056517252.

The spelling of 42291742 in words is "forty-two million, two hundred ninety-one thousand, seven hundred forty-two".