42520212 has 36 divisors (see below), whose sum is σ = 122836896. Its totient is φ = 12148560.

The previous prime is 42520211. The next prime is 42520217. The reversal of 42520212 is 21202524.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520211) by changing a digit.

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, 84114 + ... + 84617.

It is an arithmetic number, because the mean of its divisors is an integer number (3412136).

Almost surely, 2^42520212 is an apocalyptic number.

42520212 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

42520212 is an abundant number, since it is smaller than the sum of its proper divisors (80316684).

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

42520212 is a wasteful number, since it uses less digits than its factorization.

42520212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168748 (or 168743 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42520212 is about 6520.7524105735. The cubic root of 42520212 is about 349.0319152648.

Adding to 42520212 its reverse (21202524), we get a palindrome (63722736).

The spelling of 42520212 in words is "forty-two million, five hundred twenty thousand, two hundred twelve".