401315421 has 16 divisors (see below), whose sum is σ = 590304960. Its totient is φ = 240938880.

The previous prime is 401315419. The next prime is 401315441. The reversal of 401315421 is 124513104.

It is not a de Polignac number, because 401315421 - 2¹ = 401315419 is a prime.

It is a super-2 number, since 2×401315421² = 322108134264814482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401315441) 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 15 ways as a sum of consecutive naturals, for example, 123891 + ... + 127088.

It is an arithmetic number, because the mean of its divisors is an integer number (36894060).

Almost surely, 2^401315421 is an apocalyptic number.

401315421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

401315421 is a deficient number, since it is larger than the sum of its proper divisors (188989539).

401315421 is a wasteful number, since it uses less digits than its factorization.

401315421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251036.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 401315421 is about 20032.8585329204. The cubic root of 401315421 is about 737.6130913807.

Adding to 401315421 its reverse (124513104), we get a palindrome (525828525).

The spelling of 401315421 in words is "four hundred one million, three hundred fifteen thousand, four hundred twenty-one".