169401 has 4 divisors (see below), whose sum is σ = 225872. Its totient is φ = 112932.
The previous prime is 169399. The next prime is 169409. The reversal of 169401 is 104961.
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 not a de Polignac number, because 169401 - 21 = 169399 is a prime.
It is a D-number.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (169409) 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, 28231 + ... + 28236.
It is an arithmetic number, because the mean of its divisors is an integer number (56468).
2169401 is an apocalyptic number.
It is an amenable number.
169401 is a deficient number, since it is larger than the sum of its proper divisors (56471).
169401 is an equidigital number, since it uses as much as digits as its factorization.
169401 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 56470.
The product of its (nonzero) digits is 216, while the sum is 21.
The square root of 169401 is about 411.5835273672. The cubic root of 169401 is about 55.3314421702.
The spelling of 169401 in words is "one hundred sixty-nine thousand, four hundred one".
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