42522012 has 72 divisors (see below), whose sum is σ = 118502384. Its totient is φ = 12773376.

The previous prime is 42522001. The next prime is 42522023. The reversal of 42522012 is 21022524.

It is an interprime number because it is at equal distance from previous prime (42522001) and next prime (42522023).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19068 + ... + 21180.

Almost surely, 2^42522012 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 42522012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59251192).

42522012 is an abundant number, since it is smaller than the sum of its proper divisors (75980372).

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

42522012 is a wasteful number, since it uses less digits than its factorization.

42522012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179 (or 2174 counting only the distinct ones).

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

The square root of 42522012 is about 6520.8904299950. The cubic root of 42522012 is about 349.0368403624.

Adding to 42522012 its reverse (21022524), we get a palindrome (63544536).

The spelling of 42522012 in words is "forty-two million, five hundred twenty-two thousand, twelve".