401208161 has 4 divisors (see below), whose sum is σ = 422324400. Its totient is φ = 380091924.

The previous prime is 401208133. The next prime is 401208167. The reversal of 401208161 is 161802104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401208161 - 2¹⁰ = 401207137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401208167) 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, 10558091 + ... + 10558128.

It is an arithmetic number, because the mean of its divisors is an integer number (105581100).

Almost surely, 2^401208161 is an apocalyptic number.

It is an amenable number.

401208161 is a deficient number, since it is larger than the sum of its proper divisors (21116239).

401208161 is a wasteful number, since it uses less digits than its factorization.

401208161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21116238.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 401208161 is about 20030.1812523002. The cubic root of 401208161 is about 737.5473713132.

The spelling of 401208161 in words is "four hundred one million, two hundred eight thousand, one hundred sixty-one".