42520240 has 60 divisors (see below), whose sum is σ = 115010496. Its totient is φ = 14577024.

The previous prime is 42520217. The next prime is 42520259. The reversal of 42520240 is 4202524.

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 11 ways as a sum of consecutive naturals, for example, 1504 + ... + 9343.

Almost surely, 2^42520240 is an apocalyptic number.

42520240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42520240 is an abundant number, since it is smaller than the sum of its proper divisors (72490256).

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

42520240 is a wasteful number, since it uses less digits than its factorization.

42520240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10874 (or 10861 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42520240 is about 6520.7545575646. The cubic root of 42520240 is about 349.0319918785.

Adding to 42520240 its reverse (4202524), we get a palindrome (46722764).

The spelling of 42520240 in words is "forty-two million, five hundred twenty thousand, two hundred forty".