400041221 has 8 divisors (see below), whose sum is σ = 406132704. Its totient is φ = 393993520.

The previous prime is 400041217. The next prime is 400041247. The reversal of 400041221 is 122140004.

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 400041221 - 2² = 400041217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400041196 and 400041205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400041251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7706 + ... + 29316.

It is an arithmetic number, because the mean of its divisors is an integer number (50766588).

Almost surely, 2^400041221 is an apocalyptic number.

It is an amenable number.

400041221 is a deficient number, since it is larger than the sum of its proper divisors (6091483).

400041221 is a wasteful number, since it uses less digits than its factorization.

400041221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21891.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 400041221 is about 20001.0304984518. The cubic root of 400041221 is about 736.8316087691.

Adding to 400041221 its reverse (122140004), we get a palindrome (522181225).

It can be divided in two parts, 40004 and 1221, that multiplied together give a palindrome (48844884).

The spelling of 400041221 in words is "four hundred million, forty-one thousand, two hundred twenty-one".