40142542 has 32 divisors (see below), whose sum is σ = 70053984. Its totient is φ = 17049600.

The previous prime is 40142533. The next prime is 40142549. The reversal of 40142542 is 24524104.

It is a happy number.

It is a super-2 number, since 2×40142542² = 3222847356443528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40142549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67398 + ... + 67990.

It is an arithmetic number, because the mean of its divisors is an integer number (2189187).

Almost surely, 2^40142542 is an apocalyptic number.

40142542 is a deficient number, since it is larger than the sum of its proper divisors (29911442).

40142542 is a wasteful number, since it uses less digits than its factorization.

40142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40142542 is about 6335.8142333878. The cubic root of 40142542 is about 342.4009467231.

Adding to 40142542 its reverse (24524104), we get a palindrome (64666646).

It can be divided in two parts, 4014 and 2542, that added together give a palindrome (6556).

The spelling of 40142542 in words is "forty million, one hundred forty-two thousand, five hundred forty-two".