40545145 has 16 divisors (see below), whose sum is σ = 51531840. Its totient is φ = 30538944.

The previous prime is 40545143. The next prime is 40545157. The reversal of 40545145 is 54154504.

It is a cyclic number.

It is not a de Polignac number, because 40545145 - 2¹ = 40545143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40545143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15202 + ... + 17668.

It is an arithmetic number, because the mean of its divisors is an integer number (3220740).

Almost surely, 2^40545145 is an apocalyptic number.

It is an amenable number.

40545145 is a deficient number, since it is larger than the sum of its proper divisors (10986695).

40545145 is a wasteful number, since it uses less digits than its factorization.

40545145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 40545145 is about 6367.5069689793. The cubic root of 40545145 is about 343.5418256910.

Adding to 40545145 its reverse (54154504), we get a palindrome (94699649).

The spelling of 40545145 in words is "forty million, five hundred forty-five thousand, one hundred forty-five".