42720586 has 16 divisors (see below), whose sum is σ = 65793024. Its totient is φ = 20793024.

The previous prime is 42720577. The next prime is 42720599. The reversal of 42720586 is 68502724.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32290 + ... + 33586.

It is an arithmetic number, because the mean of its divisors is an integer number (4112064).

Almost surely, 2^42720586 is an apocalyptic number.

42720586 is a deficient number, since it is larger than the sum of its proper divisors (23072438).

42720586 is a wasteful number, since it uses less digits than its factorization.

42720586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 42720586 is about 6536.0986834655. The cubic root of 42720586 is about 349.5793204206.

The spelling of 42720586 in words is "forty-two million, seven hundred twenty thousand, five hundred eighty-six".