42909742 has 4 divisors (see below), whose sum is σ = 64364616. Its totient is φ = 21454870.

The previous prime is 42909707. The next prime is 42909767. The reversal of 42909742 is 24790924.

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

It is a congruent number.

It is an unprimeable number.

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, 10727434 + ... + 10727437.

It is an arithmetic number, because the mean of its divisors is an integer number (16091154).

Almost surely, 2^42909742 is an apocalyptic number.

42909742 is a deficient number, since it is larger than the sum of its proper divisors (21454874).

42909742 is a wasteful number, since it uses less digits than its factorization.

42909742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21454873.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 42909742 is about 6550.5528011001. The cubic root of 42909742 is about 350.0945105314.

The spelling of 42909742 in words is "forty-two million, nine hundred nine thousand, seven hundred forty-two".