421222356 has 120 divisors (see below), whose sum is σ = 1159854696. Its totient is φ = 133125120.

The previous prime is 421222313. The next prime is 421222363. The reversal of 421222356 is 653222124.

It is a happy number.

421222356 is a `hidden beast` number, since 421 + 2 + 2 + 235 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 131882256 + 289340100 = 11484^2 + 17010^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 491080 + ... + 491936.

Almost surely, 2^421222356 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 421222356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (579927348).

421222356 is an abundant number, since it is smaller than the sum of its proper divisors (738632340).

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

421222356 is a wasteful number, since it uses less digits than its factorization.

421222356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 940 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 421222356 is about 20523.7022975875. The cubic root of 421222356 is about 749.6130483923.

The spelling of 421222356 in words is "four hundred twenty-one million, two hundred twenty-two thousand, three hundred fifty-six".