40307545 has 4 divisors (see below), whose sum is σ = 48369060. Its totient is φ = 32246032.

The previous prime is 40307479. The next prime is 40307549. The reversal of 40307545 is 54570304.

40307545 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 20912329 + 19395216 = 4573^2 + 4404^2 .

It is a cyclic number.

It is not a de Polignac number, because 40307545 - 2¹³ = 40299353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40307549) 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, 4030750 + ... + 4030759.

It is an arithmetic number, because the mean of its divisors is an integer number (12092265).

Almost surely, 2^40307545 is an apocalyptic number.

It is an amenable number.

40307545 is a deficient number, since it is larger than the sum of its proper divisors (8061515).

40307545 is an equidigital number, since it uses as much as digits as its factorization.

40307545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8061514.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 40307545 is about 6348.8223317400. The cubic root of 40307545 is about 342.8694434658.

Adding to 40307545 its reverse (54570304), we get a palindrome (94877849).

The spelling of 40307545 in words is "forty million, three hundred seven thousand, five hundred forty-five".