40905123 has 16 divisors (see below), whose sum is σ = 62453760. Its totient is φ = 23328576.

The previous prime is 40905107. The next prime is 40905131. The reversal of 40905123 is 32150904.

It is not a de Polignac number, because 40905123 - 2⁴ = 40905107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40905093 and 40905102.

It is not an unprimeable number, because it can be changed into a prime (40905223) 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 in 15 ways as a sum of consecutive naturals, for example, 11143 + ... + 14351.

It is an arithmetic number, because the mean of its divisors is an integer number (3903360).

Almost surely, 2^40905123 is an apocalyptic number.

40905123 is a deficient number, since it is larger than the sum of its proper divisors (21548637).

40905123 is a wasteful number, since it uses less digits than its factorization.

40905123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 40905123 is about 6395.7112974242. The cubic root of 40905123 is about 344.5555377076. Note that the first 4 decimals are identical.

The spelling of 40905123 in words is "forty million, nine hundred five thousand, one hundred twenty-three".