40001045 has 16 divisors (see below), whose sum is σ = 55634688. Its totient is φ = 27041280.

The previous prime is 40001041. The next prime is 40001057. The reversal of 40001045 is 54010004.

It is not a de Polignac number, because 40001045 - 2² = 40001041 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001041) 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, 5564 + ... + 10533.

It is an arithmetic number, because the mean of its divisors is an integer number (3477168).

Almost surely, 2^40001045 is an apocalyptic number.

It is an amenable number.

40001045 is a deficient number, since it is larger than the sum of its proper divisors (15633643).

40001045 is a wasteful number, since it uses less digits than its factorization.

40001045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16180.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 40001045 is about 6324.6379343011. The cubic root of 40001045 is about 341.9981675175.

Adding to 40001045 its reverse (54010004), we get a palindrome (94011049).

The spelling of 40001045 in words is "forty million, one thousand, forty-five".