401243421 has 8 divisors (see below), whose sum is σ = 543761824. Its totient is φ = 263110320.

The previous prime is 401243411. The next prime is 401243431. The reversal of 401243421 is 124342104.

It is an interprime number because it is at equal distance from previous prime (401243411) and next prime (401243431).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401243421 - 2⁹ = 401242909 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 (401243411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1096111 + ... + 1096476.

It is an arithmetic number, because the mean of its divisors is an integer number (67970228).

Almost surely, 2^401243421 is an apocalyptic number.

It is an amenable number.

401243421 is a deficient number, since it is larger than the sum of its proper divisors (142518403).

401243421 is a wasteful number, since it uses less digits than its factorization.

401243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192651.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 401243421 is about 20031.0614047284. The cubic root of 401243421 is about 737.5689770207.

Adding to 401243421 its reverse (124342104), we get a palindrome (525585525).

The spelling of 401243421 in words is "four hundred one million, two hundred forty-three thousand, four hundred twenty-one".