40521545 has 4 divisors (see below), whose sum is σ = 48625860. Its totient is φ = 32417232.

The previous prime is 40521541. The next prime is 40521563. The reversal of 40521545 is 54512504.

40521545 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.

It can be written as a sum of positive squares in 2 ways, for example, as 27762361 + 12759184 = 5269^2 + 3572^2 .

It is a cyclic number.

It is not a de Polignac number, because 40521545 - 2² = 40521541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40521541) 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, 4052150 + ... + 4052159.

It is an arithmetic number, because the mean of its divisors is an integer number (12156465).

Almost surely, 2^40521545 is an apocalyptic number.

It is an amenable number.

40521545 is a deficient number, since it is larger than the sum of its proper divisors (8104315).

40521545 is an equidigital number, since it uses as much as digits as its factorization.

40521545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8104314.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 40521545 is about 6365.6535406822. The cubic root of 40521545 is about 343.4751579421.

The spelling of 40521545 in words is "forty million, five hundred twenty-one thousand, five hundred forty-five".