40105825 has 12 divisors (see below), whose sum is σ = 49973488. Its totient is φ = 31928400.

The previous prime is 40105823. The next prime is 40105829. The reversal of 40105825 is 52850104.

It is not a de Polignac number, because 40105825 - 2¹ = 40105823 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40105825.

It is not an unprimeable number, because it can be changed into a prime (40105823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1474 + ... + 9076.

Almost surely, 2^40105825 is an apocalyptic number.

It is an amenable number.

40105825 is a deficient number, since it is larger than the sum of its proper divisors (9867663).

40105825 is a wasteful number, since it uses less digits than its factorization.

40105825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7824 (or 7819 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 40105825 is about 6332.9159950216. The cubic root of 40105825 is about 342.2965207623.

Adding to 40105825 its reverse (52850104), we get a palindrome (92955929).

The spelling of 40105825 in words is "forty million, one hundred five thousand, eight hundred twenty-five".