117421 has 4 divisors (see below), whose sum is σ = 121500. Its totient is φ = 113344.

The previous prime is 117413. The next prime is 117427. The reversal of 117421 is 124711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124711 = 311 ⋅401.

It can be written as a sum of positive squares in 2 ways, for example, as 44521 + 72900 = 211^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 117421 - 2³ = 117413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117395 and 117404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117427) 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, 1996 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (30375).

2¹¹⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

117421 is a deficient number, since it is larger than the sum of its proper divisors (4079).

117421 is an equidigital number, since it uses as much as digits as its factorization.

117421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078.

The product of its digits is 56, while the sum is 16.

The square root of 117421 is about 342.6674773012. The cubic root of 117421 is about 48.9683260524.

The spelling of 117421 in words is "one hundred seventeen thousand, four hundred twenty-one", and thus it is an iban number.