401971 has 4 divisors (see below), whose sum is σ = 419472. Its totient is φ = 384472.

The previous prime is 401959. The next prime is 401981. The reversal of 401971 is 179104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401971 - 2⁵ = 401939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8716 + ... + 8761.

It is an arithmetic number, because the mean of its divisors is an integer number (104868).

2⁴⁰¹⁹⁷¹ is an apocalyptic number.

401971 is a deficient number, since it is larger than the sum of its proper divisors (17501).

401971 is a wasteful number, since it uses less digits than its factorization.

401971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17500.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 401971 is about 634.0118295426. The cubic root of 401971 is about 73.8014521738.

The spelling of 401971 in words is "four hundred one thousand, nine hundred seventy-one".