40720125 has 16 divisors (see below), whose sum is σ = 67758912. Its totient is φ = 21717200.

The previous prime is 40720087. The next prime is 40720129. The reversal of 40720125 is 52102704.

It is not a de Polignac number, because 40720125 - 2¹⁰ = 40719101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40720129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53919 + ... + 54668.

It is an arithmetic number, because the mean of its divisors is an integer number (4234932).

Almost surely, 2^40720125 is an apocalyptic number.

It is an amenable number.

40720125 is a deficient number, since it is larger than the sum of its proper divisors (27038787).

40720125 is a wasteful number, since it uses less digits than its factorization.

40720125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108605 (or 108595 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 40720125 is about 6381.2322477716. The cubic root of 40720125 is about 344.0353223374.

Adding to 40720125 its reverse (52102704), we get a palindrome (92822829).

The spelling of 40720125 in words is "forty million, seven hundred twenty thousand, one hundred twenty-five".