420002455 has 4 divisors (see below), whose sum is σ = 504002952. Its totient is φ = 336001960.

The previous prime is 420002441. The next prime is 420002461. The reversal of 420002455 is 554200024.

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

It is not a de Polignac number, because 420002455 - 2¹⁷ = 419871383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42000241 + ... + 42000250.

It is an arithmetic number, because the mean of its divisors is an integer number (126000738).

Almost surely, 2^420002455 is an apocalyptic number.

420002455 is a deficient number, since it is larger than the sum of its proper divisors (84000497).

420002455 is an equidigital number, since it uses as much as digits as its factorization.

420002455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84000496.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 420002455 is about 20493.9614276986. The cubic root of 420002455 is about 748.8886978604. Note that the first 3 decimals are identical.

Adding to 420002455 its reverse (554200024), we get a palindrome (974202479).

The spelling of 420002455 in words is "four hundred twenty million, two thousand, four hundred fifty-five".