40250405 has 32 divisors (see below), whose sum is σ = 54552960. Its totient is φ = 28304640.

The previous prime is 40250401. The next prime is 40250411. The reversal of 40250405 is 50405204.

It is a happy number.

It is not a de Polignac number, because 40250405 - 2² = 40250401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40250401) 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 31 ways as a sum of consecutive naturals, for example, 246854 + ... + 247016.

It is an arithmetic number, because the mean of its divisors is an integer number (1704780).

Almost surely, 2^40250405 is an apocalyptic number.

It is an amenable number.

40250405 is a deficient number, since it is larger than the sum of its proper divisors (14302555).

40250405 is a wasteful number, since it uses less digits than its factorization.

40250405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40250405 is about 6344.3206886159. The cubic root of 40250405 is about 342.7073495371.

Adding to 40250405 its reverse (50405204), we get a palindrome (90655609).

The spelling of 40250405 in words is "forty million, two hundred fifty thousand, four hundred five".