42740726 has 16 divisors (see below), whose sum is σ = 73646496. Its totient is φ = 18223296.

The previous prime is 42740717. The next prime is 42740729. The reversal of 42740726 is 62704724.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42740692 and 42740701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42740729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4991 + ... + 10506.

It is an arithmetic number, because the mean of its divisors is an integer number (4602906).

Almost surely, 2^42740726 is an apocalyptic number.

42740726 is a deficient number, since it is larger than the sum of its proper divisors (30905770).

42740726 is a wasteful number, since it uses less digits than its factorization.

42740726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15703.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 42740726 is about 6537.6391763388. The cubic root of 42740726 is about 349.6342464885.

The spelling of 42740726 in words is "forty-two million, seven hundred forty thousand, seven hundred twenty-six".