401997271 has 8 divisors (see below), whose sum is σ = 437207904. Its totient is φ = 367399200.

The previous prime is 401997227. The next prime is 401997293. The reversal of 401997271 is 172799104.

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 401997271 - 2⁷ = 401997143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401997671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151771 + ... + 154396.

It is an arithmetic number, because the mean of its divisors is an integer number (54650988).

Almost surely, 2^401997271 is an apocalyptic number.

401997271 is a deficient number, since it is larger than the sum of its proper divisors (35210633).

401997271 is a wasteful number, since it uses less digits than its factorization.

401997271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306281.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 401997271 is about 20049.8696005735. The cubic root of 401997271 is about 738.0305991479.

The spelling of 401997271 in words is "four hundred one million, nine hundred ninety-seven thousand, two hundred seventy-one".