79401 has 16 divisors (see below), whose sum is σ = 128000. Its totient is φ = 42768.

The previous prime is 79399. The next prime is 79411. The reversal of 79401 is 10497.

79401 is a nontrivial binomial coefficient, being equal to C(399, 2).

It is not a de Polignac number, because 79401 - 2¹ = 79399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

79401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (79411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300 + ... + 498.

It is an arithmetic number, because the mean of its divisors is an integer number (8000).

2⁷⁹⁴⁰¹ is an apocalyptic number.

79401 is the 398-th triangular number.

It is an amenable number.

79401 is a deficient number, since it is larger than the sum of its proper divisors (48599).

79401 is a wasteful number, since it uses less digits than its factorization.

79401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 79401 is about 281.7818305001. The cubic root of 79401 is about 42.9808820729.

Adding to 79401 its reverse (10497), we get a palindrome (89898).

The spelling of 79401 in words is "seventy-nine thousand, four hundred one".