40466021 has 4 divisors (see below), whose sum is σ = 40479552. Its totient is φ = 40452492.

The previous prime is 40466003. The next prime is 40466033. The reversal of 40466021 is 12066404.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40466021 - 2¹⁰ = 40464997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40466071) 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, 71 + ... + 8996.

It is an arithmetic number, because the mean of its divisors is an integer number (10119888).

Almost surely, 2^40466021 is an apocalyptic number.

It is an amenable number.

40466021 is a deficient number, since it is larger than the sum of its proper divisors (13531).

40466021 is an equidigital number, since it uses as much as digits as its factorization.

40466021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40466021 is about 6361.2908281260. The cubic root of 40466021 is about 343.3182057829.

The spelling of 40466021 in words is "forty million, four hundred sixty-six thousand, twenty-one".