40725637 has 4 divisors (see below), whose sum is σ = 40740640. Its totient is φ = 40710636.

The previous prime is 40725631. The next prime is 40725649. The reversal of 40725637 is 73652704.

It is a happy number.

40725637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40725637 - 2¹⁹ = 40201349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40725631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2163 + ... + 9280.

It is an arithmetic number, because the mean of its divisors is an integer number (10185160).

Almost surely, 2^40725637 is an apocalyptic number.

It is an amenable number.

40725637 is a deficient number, since it is larger than the sum of its proper divisors (15003).

40725637 is a wasteful number, since it uses less digits than its factorization.

40725637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15002.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 40725637 is about 6381.6641246622. The cubic root of 40725637 is about 344.0508448597.

The spelling of 40725637 in words is "forty million, seven hundred twenty-five thousand, six hundred thirty-seven".