421356 has 48 divisors (see below), whose sum is σ = 1102304. Its totient is φ = 124416.

The previous prime is 421349. The next prime is 421361. The reversal of 421356 is 653124.

It is a happy number.

It is an unprimeable number.

421356 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5736 + ... + 5808.

2⁴²¹³⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551152).

421356 is an abundant number, since it is smaller than the sum of its proper divisors (680948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421356 is a wasteful number, since it uses less digits than its factorization.

421356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 128 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 421356 is about 649.1194034998. The cubic root of 421356 is about 74.9692318238.

It can be divided in two parts, 421 and 356, that added together give a palindrome (777).

The spelling of 421356 in words is "four hundred twenty-one thousand, three hundred fifty-six".