40001123 has 4 divisors (see below), whose sum is σ = 40293240. Its totient is φ = 39709008.

The previous prime is 40001111. The next prime is 40001161. The reversal of 40001123 is 32110004.

It is a happy number.

40001123 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 40001123 - 2⁸ = 40000867 is a prime.

It is a super-2 number, since 2×40001123² = 3200179682522258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40001173) 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, 145853 + ... + 146126.

It is an arithmetic number, because the mean of its divisors is an integer number (10073310).

Almost surely, 2^40001123 is an apocalyptic number.

40001123 is a deficient number, since it is larger than the sum of its proper divisors (292117).

40001123 is a wasteful number, since it uses less digits than its factorization.

40001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292116.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 40001123 is about 6324.6441006589. The cubic root of 40001123 is about 341.9983898104.

Adding to 40001123 its reverse (32110004), we get a palindrome (72111127).

The spelling of 40001123 in words is "forty million, one thousand, one hundred twenty-three".