41640421 has 4 divisors (see below), whose sum is σ = 41682700. Its totient is φ = 41598144.

The previous prime is 41640407. The next prime is 41640437. The reversal of 41640421 is 12404614.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4601025 + 37039396 = 2145^2 + 6086^2 .

It is a cyclic number.

It is not a de Polignac number, because 41640421 - 2⁹ = 41639909 is a prime.

It is a super-2 number, since 2×41640421² = 3467849322114482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 41640392 and 41640401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41610421) 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, 19626 + ... + 21643.

It is an arithmetic number, because the mean of its divisors is an integer number (10420675).

Almost surely, 2^41640421 is an apocalyptic number.

It is an amenable number.

41640421 is a deficient number, since it is larger than the sum of its proper divisors (42279).

41640421 is a wasteful number, since it uses less digits than its factorization.

41640421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42278.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 41640421 is about 6452.9389428384. The cubic root of 41640421 is about 346.6078309709.

The spelling of 41640421 in words is "forty-one million, six hundred forty thousand, four hundred twenty-one".