40115142 has 32 divisors (see below), whose sum is σ = 90408960. Its totient is φ = 13182120.

The previous prime is 40115093. The next prime is 40115143. The reversal of 40115142 is 24151104.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40115143) 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, 1398 + ... + 9065.

It is an arithmetic number, because the mean of its divisors is an integer number (2825280).

Almost surely, 2^40115142 is an apocalyptic number.

40115142 is an abundant number, since it is smaller than the sum of its proper divisors (50293818).

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

40115142 is a wasteful number, since it uses less digits than its factorization.

40115142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10545 (or 10539 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 40115142 is about 6333.6515534090. The cubic root of 40115142 is about 342.3230250565.

Adding to 40115142 its reverse (24151104), we get a palindrome (64266246).

The spelling of 40115142 in words is "forty million, one hundred fifteen thousand, one hundred forty-two".