40815142 has 4 divisors (see below), whose sum is σ = 61222716. Its totient is φ = 20407570.

The previous prime is 40815139. The next prime is 40815157. The reversal of 40815142 is 24151804.

40815142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10203784 + ... + 10203787.

It is an arithmetic number, because the mean of its divisors is an integer number (15305679).

Almost surely, 2^40815142 is an apocalyptic number.

40815142 is a deficient number, since it is larger than the sum of its proper divisors (20407574).

40815142 is a wasteful number, since it uses less digits than its factorization.

40815142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20407573.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 40815142 is about 6388.6729451428. The cubic root of 40815142 is about 344.3027070053.

Adding to 40815142 its reverse (24151804), we get a palindrome (64966946).

The spelling of 40815142 in words is "forty million, eight hundred fifteen thousand, one hundred forty-two".