40542012 has 144 divisors (see below), whose sum is σ = 125637120. Its totient is φ = 11267424.

The previous prime is 40542001. The next prime is 40542041. The reversal of 40542012 is 21024504.

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 47 ways as a sum of consecutive naturals, for example, 248643 + ... + 248805.

It is an arithmetic number, because the mean of its divisors is an integer number (872480).

Almost surely, 2^40542012 is an apocalyptic number.

40542012 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40542012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62818560).

40542012 is an abundant number, since it is smaller than the sum of its proper divisors (85095108).

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

40542012 is a wasteful number, since it uses less digits than its factorization.

40542012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 222 counting only the distinct ones).

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

The square root of 40542012 is about 6367.2609495764. The cubic root of 40542012 is about 343.5329767543.

Adding to 40542012 its reverse (21024504), we get a palindrome (61566516).

The spelling of 40542012 in words is "forty million, five hundred forty-two thousand, twelve".