40941721 has 8 divisors (see below), whose sum is σ = 42187904. Its totient is φ = 39702960.

The previous prime is 40941697. The next prime is 40941737. The reversal of 40941721 is 12714904.

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 40941721 - 2⁵ = 40941689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40941721.

It is not an unprimeable number, because it can be changed into a prime (40941521) 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, 10576 + ... + 13918.

It is an arithmetic number, because the mean of its divisors is an integer number (5273488).

Almost surely, 2^40941721 is an apocalyptic number.

It is an amenable number.

40941721 is a deficient number, since it is larger than the sum of its proper divisors (1246183).

40941721 is a wasteful number, since it uses less digits than its factorization.

40941721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 40941721 is about 6398.5717937677. The cubic root of 40941721 is about 344.6582655467.

The spelling of 40941721 in words is "forty million, nine hundred forty-one thousand, seven hundred twenty-one".