42521120 has 24 divisors (see below), whose sum is σ = 100456524. Its totient is φ = 17008384.

The previous prime is 42521117. The next prime is 42521153. The reversal of 42521120 is 2112524.

It can be written as a sum of positive squares in 2 ways, for example, as 42042256 + 478864 = 6484^2 + 692^2 .

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132719 + ... + 133038.

Almost surely, 2^42521120 is an apocalyptic number.

42521120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42521120 is an abundant number, since it is smaller than the sum of its proper divisors (57935404).

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

42521120 is a wasteful number, since it uses less digits than its factorization.

42521120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265772 (or 265764 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 42521120 is about 6520.8220340690. The cubic root of 42521120 is about 349.0343997203.

Adding to 42521120 its reverse (2112524), we get a palindrome (44633644).

The spelling of 42521120 in words is "forty-two million, five hundred twenty-one thousand, one hundred twenty".