40564123 has 4 divisors (see below), whose sum is σ = 40673248. Its totient is φ = 40455000.

The previous prime is 40564103. The next prime is 40564163. The reversal of 40564123 is 32146504.

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 40564123 - 2¹⁷ = 40433051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40564103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54003 + ... + 54748.

It is an arithmetic number, because the mean of its divisors is an integer number (10168312).

Almost surely, 2^40564123 is an apocalyptic number.

40564123 is a deficient number, since it is larger than the sum of its proper divisors (109125).

40564123 is a wasteful number, since it uses less digits than its factorization.

40564123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109124.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 40564123 is about 6368.9970167994. The cubic root of 40564123 is about 343.5954179670.

The spelling of 40564123 in words is "forty million, five hundred sixty-four thousand, one hundred twenty-three".