40525645 has 4 divisors (see below), whose sum is σ = 48630780. Its totient is φ = 32420512.

The previous prime is 40525643. The next prime is 40525669. The reversal of 40525645 is 54652504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22155849 + 18369796 = 4707^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 40525645 - 2¹ = 40525643 is a prime.

It is a super-3 number, since 3×40525645³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40525643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4052560 + ... + 4052569.

It is an arithmetic number, because the mean of its divisors is an integer number (12157695).

Almost surely, 2^40525645 is an apocalyptic number.

It is an amenable number.

40525645 is a deficient number, since it is larger than the sum of its proper divisors (8105135).

40525645 is an equidigital number, since it uses as much as digits as its factorization.

40525645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8105134.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 40525645 is about 6365.9755733116. The cubic root of 40525645 is about 343.4867419085.

The spelling of 40525645 in words is "forty million, five hundred twenty-five thousand, six hundred forty-five".