40154123 has 2 divisors, whose sum is σ = 40154124. Its totient is φ = 40154122.

The previous prime is 40154111. The next prime is 40154137. The reversal of 40154123 is 32145104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40154123 - 2¹² = 40150027 is a prime.

It is a super-2 number, since 2×40154123² = 3224707187798258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 40154095 and 40154104.

It is not a weakly prime, because it can be changed into another prime (40154173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077061 + 20077062.

It is an arithmetic number, because the mean of its divisors is an integer number (20077062).

Almost surely, 2^40154123 is an apocalyptic number.

40154123 is a deficient number, since it is larger than the sum of its proper divisors (1).

40154123 is an equidigital number, since it uses as much as digits as its factorization.

40154123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40154123 is about 6336.7280989482. The cubic root of 40154123 is about 342.4338707641.

Adding to 40154123 its reverse (32145104), we get a palindrome (72299227).

The spelling of 40154123 in words is "forty million, one hundred fifty-four thousand, one hundred twenty-three".