421420455 has 16 divisors (see below), whose sum is σ = 749192160. Its totient is φ = 224757504.

The previous prime is 421420453. The next prime is 421420457. The reversal of 421420455 is 554024124.

It is an interprime number because it is at equal distance from previous prime (421420453) and next prime (421420457).

It is not a de Polignac number, because 421420455 - 2¹ = 421420453 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421420451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560682 + ... + 1560951.

It is an arithmetic number, because the mean of its divisors is an integer number (46824510).

Almost surely, 2^421420455 is an apocalyptic number.

421420455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421420455 is a deficient number, since it is larger than the sum of its proper divisors (327771705).

421420455 is a wasteful number, since it uses less digits than its factorization.

421420455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121647 (or 3121641 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 421420455 is about 20528.5278332373. The cubic root of 421420455 is about 749.7305432023.

Adding to 421420455 its reverse (554024124), we get a palindrome (975444579).

It can be divided in two parts, 421420 and 455, that added together give a cube (421875 = 75³).

The spelling of 421420455 in words is "four hundred twenty-one million, four hundred twenty thousand, four hundred fifty-five".