42511424 has 56 divisors (see below), whose sum is σ = 91595448. Its totient is φ = 19496960.

The previous prime is 42511423. The next prime is 42511439. The reversal of 42511424 is 42411524.

It can be written as a sum of positive squares in 4 ways, for example, as 1960000 + 40551424 = 1400^2 + 6368^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42511424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42511423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44132 + ... + 45084.

It is an arithmetic number, because the mean of its divisors is an integer number (1635633).

Almost surely, 2^42511424 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 42511424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45797724).

42511424 is an abundant number, since it is smaller than the sum of its proper divisors (49084024).

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

42511424 is a wasteful number, since it uses less digits than its factorization.

42511424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1013 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 42511424 is about 6520.0785271345. The cubic root of 42511424 is about 349.0078678478.

Adding to 42511424 its reverse (42411524), we get a palindrome (84922948).

The spelling of 42511424 in words is "forty-two million, five hundred eleven thousand, four hundred twenty-four".