40115123 has 4 divisors (see below), whose sum is σ = 40149408. Its totient is φ = 40080840.

The previous prime is 40115093. The next prime is 40115143. The reversal of 40115123 is 32151104.

40115123 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 cyclic number.

It is not a de Polignac number, because 40115123 - 2¹⁰ = 40114099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40115143) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 15323 + ... + 17748.

It is an arithmetic number, because the mean of its divisors is an integer number (10037352).

Almost surely, 2^40115123 is an apocalyptic number.

40115123 is a deficient number, since it is larger than the sum of its proper divisors (34285).

40115123 is a wasteful number, since it uses less digits than its factorization.

40115123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34284.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40115123 is about 6333.6500534842. The cubic root of 40115123 is about 342.3229710109.

Adding to 40115123 its reverse (32151104), we get a palindrome (72266227).

The spelling of 40115123 in words is "forty million, one hundred fifteen thousand, one hundred twenty-three".