356421 has 24 divisors (see below), whose sum is σ = 556320.
Its totient is φ = 202176.
The previous prime is 356399. The next prime is 356441. The reversal of 356421 is 124653.
It is a happy number.
It is not a de Polignac number, because 356421 - 29 = 355909 is a prime.
Its product of digits (720) is a multiple of the sum of its prime divisors (72).
It is a Curzon number.
It is a nialpdrome in base 13.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 356421.
It is not an unprimeable number, because it can be changed into a prime (356441) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9615 + ... + 9651.
It is an arithmetic number, because the mean of its divisors is an integer number (23180).
2356421 is an apocalyptic number.
It is an amenable number.
356421 is a deficient number, since it is larger than the sum of its proper divisors (199899).
356421 is a wasteful number, since it uses less digits than its factorization.
356421 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 85 (or 72 counting only the distinct ones).
The product of its digits is 720, while the sum is 21.
The square root of 356421 is about 597.0100501667.
The cubic root of 356421 is about 70.9013375361.
It can be divided in two parts, 356 and 421, that added together give a palindrome (777).
The spelling of 356421 in words is "three hundred fifty-six thousand, four hundred twenty-one".