401722105 has 16 divisors (see below), whose sum is σ = 489298320. Its totient is φ = 316588032.

The previous prime is 401722103. The next prime is 401722109. The reversal of 401722105 is 501227104.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 14891881 + 386830224 = 3859^2 + 19668^2 .

It is a cyclic number.

It is not a de Polignac number, because 401722105 - 2¹ = 401722103 is a prime.

It is a super-2 number, since 2×401722105² = 322761299291262050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401722103) 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, 109257 + ... + 112873.

It is an arithmetic number, because the mean of its divisors is an integer number (30581145).

Almost surely, 2^401722105 is an apocalyptic number.

It is an amenable number.

401722105 is a deficient number, since it is larger than the sum of its proper divisors (87576215).

401722105 is a wasteful number, since it uses less digits than its factorization.

401722105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 401722105 is about 20043.0063862685. The cubic root of 401722105 is about 737.8621674228.

Adding to 401722105 its reverse (501227104), we get a palindrome (902949209).

The spelling of 401722105 in words is "four hundred one million, seven hundred twenty-two thousand, one hundred five".