42740734 has 4 divisors (see below), whose sum is σ = 64111104. Its totient is φ = 21370366.

The previous prime is 42740729. The next prime is 42740741. The reversal of 42740734 is 43704724.

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 junction number, because it is equal to n+sod(n) for n = 42740696 and 42740705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10685182 + ... + 10685185.

It is an arithmetic number, because the mean of its divisors is an integer number (16027776).

Almost surely, 2^42740734 is an apocalyptic number.

42740734 is a deficient number, since it is larger than the sum of its proper divisors (21370370).

42740734 is a wasteful number, since it uses less digits than its factorization.

42740734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21370369.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 42740734 is about 6537.6397881804. The cubic root of 42740734 is about 349.6342683028.

The spelling of 42740734 in words is "forty-two million, seven hundred forty thousand, seven hundred thirty-four".