420425250 has 128 divisors (see below), whose sum is σ = 1216829952. Its totient is φ = 94694400.

The previous prime is 420425221. The next prime is 420425287. The reversal of 420425250 is 52524024.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 420425250.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 382702 + ... + 383798.

It is an arithmetic number, because the mean of its divisors is an integer number (9506484).

Almost surely, 2^420425250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420425250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608414976).

420425250 is an abundant number, since it is smaller than the sum of its proper divisors (796404702).

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

420425250 is a wasteful number, since it uses less digits than its factorization.

420425250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1187 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 420425250 is about 20504.2739447170. The cubic root of 420425250 is about 749.1399029099.

Adding to 420425250 its reverse (52524024), we get a palindrome (472949274).

The spelling of 420425250 in words is "four hundred twenty million, four hundred twenty-five thousand, two hundred fifty".