40921005 has 8 divisors (see below), whose sum is σ = 65473632. Its totient is φ = 21824528.

The previous prime is 40920949. The next prime is 40921007. The reversal of 40921005 is 50012904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40921005 - 2⁹ = 40920493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40921007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1364019 + ... + 1364048.

It is an arithmetic number, because the mean of its divisors is an integer number (8184204).

Almost surely, 2^40921005 is an apocalyptic number.

It is an amenable number.

40921005 is a deficient number, since it is larger than the sum of its proper divisors (24552627).

40921005 is a wasteful number, since it uses less digits than its factorization.

40921005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728075.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 40921005 is about 6396.9527901963. The cubic root of 40921005 is about 344.6001248121.

Adding to 40921005 its reverse (50012904), we get a palindrome (90933909).

The spelling of 40921005 in words is "forty million, nine hundred twenty-one thousand, five".