42052520 has 16 divisors (see below), whose sum is σ = 94618260. Its totient is φ = 16820992.

The previous prime is 42052513. The next prime is 42052559. The reversal of 42052520 is 2525024.

It can be written as a sum of positive squares in 2 ways, for example, as 34880836 + 7171684 = 5906^2 + 2678^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 42052492 and 42052501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525617 + ... + 525696.

Almost surely, 2^42052520 is an apocalyptic number.

42052520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42052520 is an abundant number, since it is smaller than the sum of its proper divisors (52565740).

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

42052520 is a wasteful number, since it uses less digits than its factorization.

42052520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051324 (or 1051320 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 42052520 is about 6484.7914384350. The cubic root of 42052520 is about 347.7474937555.

Adding to 42052520 its reverse (2525024), we get a palindrome (44577544).

The spelling of 42052520 in words is "forty-two million, fifty-two thousand, five hundred twenty".