42721485 has 32 divisors (see below), whose sum is σ = 69856128. Its totient is φ = 22291200.

The previous prime is 42721463. The next prime is 42721501. The reversal of 42721485 is 58412724.

42721485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42721485 - 2⁵ = 42721453 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246859 + ... + 247031.

It is an arithmetic number, because the mean of its divisors is an integer number (2183004).

Almost surely, 2^42721485 is an apocalyptic number.

It is an amenable number.

42721485 is a deficient number, since it is larger than the sum of its proper divisors (27134643).

42721485 is a wasteful number, since it uses less digits than its factorization.

42721485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its digits is 17920, while the sum is 33.

The square root of 42721485 is about 6536.1674550152. The cubic root of 42721485 is about 349.5817725531.

It can be divided in two parts, 427 and 21485, that added together give a palindrome (21912).

The spelling of 42721485 in words is "forty-two million, seven hundred twenty-one thousand, four hundred eighty-five".