42720542 has 8 divisors (see below), whose sum is σ = 66148032. Its totient is φ = 20671200.

The previous prime is 42720539. The next prime is 42720577. The reversal of 42720542 is 24502724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344459 + ... + 344582.

It is an arithmetic number, because the mean of its divisors is an integer number (8268504).

Almost surely, 2^42720542 is an apocalyptic number.

42720542 is a deficient number, since it is larger than the sum of its proper divisors (23427490).

42720542 is a wasteful number, since it uses less digits than its factorization.

42720542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689074.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 42720542 is about 6536.0953175424. The cubic root of 42720542 is about 349.5792004043.

The spelling of 42720542 in words is "forty-two million, seven hundred twenty thousand, five hundred forty-two".