42087500 has 144 divisors (see below), whose sum is σ = 116367552. Its totient is φ = 12960000.

The previous prime is 42087481. The next prime is 42087503. The reversal of 42087500 is 578024.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 42087500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42087503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1137482 + ... + 1137518.

It is an arithmetic number, because the mean of its divisors is an integer number (808108).

Almost surely, 2^42087500 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 42087500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58183776).

42087500 is an abundant number, since it is smaller than the sum of its proper divisors (74280052).

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

42087500 is a wasteful number, since it uses less digits than its factorization.

42087500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 42087500 is about 6487.4879575996. The cubic root of 42087500 is about 347.8438877892.

The spelling of 42087500 in words is "forty-two million, eighty-seven thousand, five hundred".