40057521 has 8 divisors (see below), whose sum is σ = 61040064. Its totient is φ = 22890000.

The previous prime is 40057481. The next prime is 40057531. The reversal of 40057521 is 12575004.

40057521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40057521 - 2¹¹ = 40055473 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40057491 and 40057500.

It is not an unprimeable number, because it can be changed into a prime (40057531) 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 7 ways as a sum of consecutive naturals, for example, 953730 + ... + 953771.

It is an arithmetic number, because the mean of its divisors is an integer number (7630008).

Almost surely, 2^40057521 is an apocalyptic number.

It is an amenable number.

40057521 is a deficient number, since it is larger than the sum of its proper divisors (20982543).

40057521 is a wasteful number, since it uses less digits than its factorization.

40057521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907511.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 40057521 is about 6329.1011210124. The cubic root of 40057521 is about 342.1590433624.

The spelling of 40057521 in words is "forty million, fifty-seven thousand, five hundred twenty-one".