40542905 has 32 divisors (see below), whose sum is σ = 55931904. Its totient is φ = 27979776.

The previous prime is 40542883. The next prime is 40542911. The reversal of 40542905 is 50924504.

It is a happy number.

40542905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40542905 - 2²⁴ = 23765689 is a prime.

It is a Duffinian number.

It is a Curzon 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 in 31 ways as a sum of consecutive naturals, for example, 69977 + ... + 70553.

It is an arithmetic number, because the mean of its divisors is an integer number (1747872).

Almost surely, 2^40542905 is an apocalyptic number.

It is an amenable number.

40542905 is a deficient number, since it is larger than the sum of its proper divisors (15388999).

40542905 is a wasteful number, since it uses less digits than its factorization.

40542905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 40542905 is about 6367.3310735347. The cubic root of 40542905 is about 343.5354990161.

The spelling of 40542905 in words is "forty million, five hundred forty-two thousand, nine hundred five".