421004255 has 8 divisors (see below), whose sum is σ = 577377312. Its totient is φ = 288688608.

The previous prime is 421004251. The next prime is 421004257. The reversal of 421004255 is 552400124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421004255 - 2² = 421004251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421004255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421004251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6014312 + ... + 6014381.

It is an arithmetic number, because the mean of its divisors is an integer number (72172164).

Almost surely, 2^421004255 is an apocalyptic number.

421004255 is a deficient number, since it is larger than the sum of its proper divisors (156373057).

421004255 is a wasteful number, since it uses less digits than its factorization.

421004255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12028705.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 421004255 is about 20518.3882164267. The cubic root of 421004255 is about 749.4836475514.

Adding to 421004255 its reverse (552400124), we get a palindrome (973404379).

The spelling of 421004255 in words is "four hundred twenty-one million, four thousand, two hundred fifty-five".