42781500 has 96 divisors (see below), whose sum is σ = 138465600. Its totient is φ = 11404800.

The previous prime is 42781481. The next prime is 42781507. The reversal of 42781500 is 518724.

42781500 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 (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42781507) by changing a digit.

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, 11916 + ... + 15084.

It is an arithmetic number, because the mean of its divisors is an integer number (1442350).

Almost surely, 2^42781500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42781500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69232800).

42781500 is an abundant number, since it is smaller than the sum of its proper divisors (95684100).

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

42781500 is a wasteful number, since it uses less digits than its factorization.

42781500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 42781500 is about 6540.7568369417. The cubic root of 42781500 is about 349.7453930628.

It can be divided in two parts, 4278 and 1500, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 42781500 in words is "forty-two million, seven hundred eighty-one thousand, five hundred".