420217254 has 64 divisors (see below), whose sum is σ = 991673280. Its totient is φ = 131443200.

The previous prime is 420217249. The next prime is 420217277. The reversal of 420217254 is 452712024.

420217254 is a `hidden beast` number, since 420 + 217 + 25 + 4 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 599104 + ... + 599804.

It is an arithmetic number, because the mean of its divisors is an integer number (15494895).

Almost surely, 2^420217254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420217254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495836640).

420217254 is an abundant number, since it is smaller than the sum of its proper divisors (571456026).

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

420217254 is a wasteful number, since it uses less digits than its factorization.

420217254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 420217254 is about 20499.2013015142. The cubic root of 420217254 is about 749.0163424545.

Adding to 420217254 its reverse (452712024), we get a palindrome (872929278).

The spelling of 420217254 in words is "four hundred twenty million, two hundred seventeen thousand, two hundred fifty-four".