420003215 has 4 divisors (see below), whose sum is σ = 504003864. Its totient is φ = 336002568.

The previous prime is 420003209. The next prime is 420003223. The reversal of 420003215 is 512300024.

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

It is a cyclic number.

It is not a de Polignac number, because 420003215 - 2⁸ = 420002959 is a prime.

It is a super-2 number, since 2×420003215² = 352805401220672450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420003193 and 420003202.

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, 42000317 + ... + 42000326.

It is an arithmetic number, because the mean of its divisors is an integer number (126000966).

Almost surely, 2^420003215 is an apocalyptic number.

420003215 is a deficient number, since it is larger than the sum of its proper divisors (84000649).

420003215 is an equidigital number, since it uses as much as digits as its factorization.

420003215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84000648.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 420003215 is about 20493.9799697375. The cubic root of 420003215 is about 748.8891495681.

Adding to 420003215 its reverse (512300024), we get a palindrome (932303239).

The spelling of 420003215 in words is "four hundred twenty million, three thousand, two hundred fifteen".