42012036 has 72 divisors (see below), whose sum is σ = 116573184. Its totient is φ = 12651840.

The previous prime is 42012017. The next prime is 42012073. The reversal of 42012036 is 63021024.

It is a happy number.

It is a super-2 number, since 2×42012036² = 3530022337730592, which contains 22 as substring.

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

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, 109501 + ... + 109883.

It is an arithmetic number, because the mean of its divisors is an integer number (1619072).

Almost surely, 2^42012036 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 42012036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58286592).

42012036 is an abundant number, since it is smaller than the sum of its proper divisors (74561148).

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

42012036 is a wasteful number, since it uses less digits than its factorization.

42012036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 42012036 is about 6481.6692294501. The cubic root of 42012036 is about 347.6358656481.

The spelling of 42012036 in words is "forty-two million, twelve thousand, thirty-six".