40012645 has 16 divisors (see below), whose sum is σ = 51679728. Its totient is φ = 29629440.

The previous prime is 40012639. The next prime is 40012657. The reversal of 40012645 is 54621004.

It can be written as a sum of positive squares in 8 ways, for example, as 2079364 + 37933281 = 1442^2 + 6159^2 .

It is not a de Polignac number, because 40012645 - 2⁷ = 40012517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1327 + ... + 9043.

It is an arithmetic number, because the mean of its divisors is an integer number (3229983).

Almost surely, 2^40012645 is an apocalyptic number.

It is an amenable number.

40012645 is a deficient number, since it is larger than the sum of its proper divisors (11667083).

40012645 is a wasteful number, since it uses less digits than its factorization.

40012645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40012645 is about 6325.5549163690. The cubic root of 40012645 is about 342.0312232816.

Adding to 40012645 its reverse (54621004), we get a palindrome (94633649).

The spelling of 40012645 in words is "forty million, twelve thousand, six hundred forty-five".