40045641 has 4 divisors (see below), whose sum is σ = 53394192. Its totient is φ = 26697092.

The previous prime is 40045637. The next prime is 40045657. The reversal of 40045641 is 14654004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40045641 - 2² = 40045637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40045631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6674271 + ... + 6674276.

It is an arithmetic number, because the mean of its divisors is an integer number (13348548).

Almost surely, 2^40045641 is an apocalyptic number.

It is an amenable number.

40045641 is a deficient number, since it is larger than the sum of its proper divisors (13348551).

40045641 is a wasteful number, since it uses less digits than its factorization.

40045641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13348550.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 40045641 is about 6328.1625295183. The cubic root of 40045641 is about 342.1252149140.

Adding to 40045641 its reverse (14654004), we get a palindrome (54699645).

The spelling of 40045641 in words is "forty million, forty-five thousand, six hundred forty-one".