40120123 has 4 divisors (see below), whose sum is σ = 40330368. Its totient is φ = 39909880.

The previous prime is 40120121. The next prime is 40120133. The reversal of 40120123 is 32102104.

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 40120123 - 2¹ = 40120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40120121) 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, 104836 + ... + 105217.

It is an arithmetic number, because the mean of its divisors is an integer number (10082592).

Almost surely, 2^40120123 is an apocalyptic number.

40120123 is a deficient number, since it is larger than the sum of its proper divisors (210245).

40120123 is a wasteful number, since it uses less digits than its factorization.

40120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210244.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40120123 is about 6334.0447582883. The cubic root of 40120123 is about 342.3371929437.

Adding to 40120123 its reverse (32102104), we get a palindrome (72222227).

The spelling of 40120123 in words is "forty million, one hundred twenty thousand, one hundred twenty-three".