40855421 has 8 divisors (see below), whose sum is σ = 42312024. Its totient is φ = 39424320.

The previous prime is 40855411. The next prime is 40855447. The reversal of 40855421 is 12455804.

It can be written as a sum of positive squares in 4 ways, for example, as 36100 + 40819321 = 190^2 + 6389^2 .

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 40855421 - 2¹⁰ = 40854397 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 (40855411) 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, 3086 + ... + 9551.

It is an arithmetic number, because the mean of its divisors is an integer number (5289003).

Almost surely, 2^40855421 is an apocalyptic number.

It is an amenable number.

40855421 is a deficient number, since it is larger than the sum of its proper divisors (1456603).

40855421 is a wasteful number, since it uses less digits than its factorization.

40855421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12751.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 40855421 is about 6391.8245438998. The cubic root of 40855421 is about 344.4159297665.

The spelling of 40855421 in words is "forty million, eight hundred fifty-five thousand, four hundred twenty-one".