400001171 has 8 divisors (see below), whose sum is σ = 402361344. Its totient is φ = 397647880.

The previous prime is 400001159. The next prime is 400001197. The reversal of 400001171 is 171100004.

It is a happy number.

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 400001171 - 2¹⁴ = 399984787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400001101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153086 + ... + 155676.

It is an arithmetic number, because the mean of its divisors is an integer number (50295168).

Almost surely, 2^400001171 is an apocalyptic number.

400001171 is a deficient number, since it is larger than the sum of its proper divisors (2360173).

400001171 is a wasteful number, since it uses less digits than its factorization.

400001171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 400001171 is about 20000.0292749786. The cubic root of 400001171 is about 736.8070187275.

Adding to 400001171 its reverse (171100004), we get a palindrome (571101175).

The spelling of 400001171 in words is "four hundred million, one thousand, one hundred seventy-one".