421220250 has 320 divisors, whose sum is σ = 1348199424. Its totient is φ = 97200000.

The previous prime is 421220249. The next prime is 421220257. The reversal of 421220250 is 52022124.

421220250 is a `hidden beast` number, since 421 + 220 + 25 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (421220257) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6905220 + ... + 6905280.

Almost surely, 2^421220250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421220250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674099712).

421220250 is an abundant number, since it is smaller than the sum of its proper divisors (926979174).

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

421220250 is a wasteful number, since it uses less digits than its factorization.

421220250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 421220250 is about 20523.6509909909. The cubic root of 421220250 is about 749.6117991014.

Adding to 421220250 its reverse (52022124), we get a palindrome (473242374).

The spelling of 421220250 in words is "four hundred twenty-one million, two hundred twenty thousand, two hundred fifty".