40405425 has 12 divisors (see below), whose sum is σ = 66803760. Its totient is φ = 21549520.

The previous prime is 40405399. The next prime is 40405429. The reversal of 40405425 is 52450404.

It is not a de Polignac number, because 40405425 - 2¹⁹ = 39881137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40405395 and 40405404.

It is not an unprimeable number, because it can be changed into a prime (40405429) 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 11 ways as a sum of consecutive naturals, for example, 269295 + ... + 269444.

It is an arithmetic number, because the mean of its divisors is an integer number (5566980).

Almost surely, 2^40405425 is an apocalyptic number.

It is an amenable number.

40405425 is a deficient number, since it is larger than the sum of its proper divisors (26398335).

40405425 is a wasteful number, since it uses less digits than its factorization.

40405425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538752 (or 538747 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 40405425 is about 6356.5261739412. The cubic root of 40405425 is about 343.1467524473.

Adding to 40405425 its reverse (52450404), we get a palindrome (92855829).

The spelling of 40405425 in words is "forty million, four hundred five thousand, four hundred twenty-five".