42561750 has 192 divisors, whose sum is σ = 135442944. Its totient is φ = 8712000.

The previous prime is 42561749. The next prime is 42561773. The reversal of 42561750 is 5716524.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 635217 + ... + 635283.

It is an arithmetic number, because the mean of its divisors is an integer number (705432).

Almost surely, 2^42561750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42561750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67721472).

42561750 is an abundant number, since it is smaller than the sum of its proper divisors (92881194).

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

42561750 is a wasteful number, since it uses less digits than its factorization.

42561750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 42561750 is about 6523.9366949718. The cubic root of 42561750 is about 349.1455347140.

It can be divided in two parts, 4256 and 1750, that added together give a palindrome (6006).

The spelling of 42561750 in words is "forty-two million, five hundred sixty-one thousand, seven hundred fifty".