40450625 has 20 divisors (see below), whose sum is σ = 51424164. Its totient is φ = 31800000.

The previous prime is 40450609. The next prime is 40450637. The reversal of 40450625 is 52605404.

It can be written as a sum of positive squares in 10 ways, for example, as 37356544 + 3094081 = 6112^2 + 1759^2 .

It is not a de Polignac number, because 40450625 - 2⁴ = 40450609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40450594 and 40450603.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 37595 + ... + 38655.

Almost surely, 2^40450625 is an apocalyptic number.

It is an amenable number.

40450625 is a deficient number, since it is larger than the sum of its proper divisors (10973539).

40450625 is an equidigital number, since it uses as much as digits as its factorization.

40450625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 40450625 is about 6360.0805812505. The cubic root of 40450625 is about 343.2746598032.

The spelling of 40450625 in words is "forty million, four hundred fifty thousand, six hundred twenty-five".