40729925 has 6 divisors (see below), whose sum is σ = 50505138. Its totient is φ = 32583920.

The previous prime is 40729907. The next prime is 40729937. The reversal of 40729925 is 52992704.

It is a Cunningham number, because it is equal to 6382²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 40729924 = 1^2 + 6382^2 .

It is not a de Polignac number, because 40729925 - 2⁶ = 40729861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 814574 + ... + 814623.

It is an arithmetic number, because the mean of its divisors is an integer number (8417523).

Almost surely, 2^40729925 is an apocalyptic number.

It is an amenable number.

40729925 is a deficient number, since it is larger than the sum of its proper divisors (9775213).

40729925 is a wasteful number, since it uses less digits than its factorization.

40729925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629207 (or 1629202 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 40729925 is about 6382.0000783453. Note that the first 4 decimals coincide. The cubic root of 40729925 is about 344.0629194672.

The spelling of 40729925 in words is "forty million, seven hundred twenty-nine thousand, nine hundred twenty-five".