42072870 has 48 divisors (see below), whose sum is σ = 117464688. Its totient is φ = 9616320.

The previous prime is 42072857. The next prime is 42072889. The reversal of 42072870 is 7827024.

42072870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 23 ways as a sum of consecutive naturals, for example, 12841 + ... + 15780.

It is an arithmetic number, because the mean of its divisors is an integer number (2447181).

Almost surely, 2^42072870 is an apocalyptic number.

42072870 is an abundant number, since it is smaller than the sum of its proper divisors (75391818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42072870 is a wasteful number, since it uses less digits than its factorization.

42072870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28645 (or 28638 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 42072870 is about 6486.3603045159. The cubic root of 42072870 is about 347.8035785457.

Adding to 42072870 its reverse (7827024), we get a palindrome (49899894).

The spelling of 42072870 in words is "forty-two million, seventy-two thousand, eight hundred seventy".