40140542 has 24 divisors (see below), whose sum is σ = 65888784. Its totient is φ = 18330624.

The previous prime is 40140539. The next prime is 40140601. The reversal of 40140542 is 24504104.

It is a super-2 number, since 2×40140542² = 3222526224107528, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34238 + ... + 35390.

It is an arithmetic number, because the mean of its divisors is an integer number (2745366).

Almost surely, 2^40140542 is an apocalyptic number.

40140542 is a deficient number, since it is larger than the sum of its proper divisors (25748242).

40140542 is a wasteful number, since it uses less digits than its factorization.

40140542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40140542 is about 6335.6563985115. The cubic root of 40140542 is about 342.3952602100.

Adding to 40140542 its reverse (24504104), we get a palindrome (64644646).

The spelling of 40140542 in words is "forty million, one hundred forty thousand, five hundred forty-two".