421305455 has 4 divisors (see below), whose sum is σ = 505566552. Its totient is φ = 337044360.

The previous prime is 421305439. The next prime is 421305457. The reversal of 421305455 is 554503124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 421305455 - 2⁴ = 421305439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421305457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42130541 + ... + 42130550.

It is an arithmetic number, because the mean of its divisors is an integer number (126391638).

Almost surely, 2^421305455 is an apocalyptic number.

421305455 is a deficient number, since it is larger than the sum of its proper divisors (84261097).

421305455 is an equidigital number, since it uses as much as digits as its factorization.

421305455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84261096.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 421305455 is about 20525.7266619236. The cubic root of 421305455 is about 749.6623398555.

Adding to 421305455 its reverse (554503124), we get a palindrome (975808579).

The spelling of 421305455 in words is "four hundred twenty-one million, three hundred five thousand, four hundred fifty-five".