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162421 = 723203

162421 has 4 divisors (see below), whose sum is σ = 185632. Its totient is φ = 139212.

The previous prime is 162419. The next prime is 162439. The reversal of 162421 is 124261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124261 = 313397.

It is a cyclic number.

It is not a de Polignac number, because 162421 - 21 = 162419 is a prime.

It is a super-3 number, since 3×1624213 = 12854281157233383, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 162395 and 162404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11595 + ... + 11608.

It is an arithmetic number, because the mean of its divisors is an integer number (46408).

2162421 is an apocalyptic number.

It is an amenable number.

162421 is a deficient number, since it is larger than the sum of its proper divisors (23211).

162421 is an equidigital number, since it uses as much as digits as its factorization.

162421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23210.

The product of its digits is 96, while the sum is 16.

The square root of 162421 is about 403.0148880625. The cubic root of 162421 is about 54.5607996388.

Adding to 162421 its reverse (124261), we get a palindrome (286682).

The spelling of 162421 in words is "one hundred sixty-two thousand, four hundred twenty-one".

Divisors: 1 7 23203 162421