420340015 has 4 divisors (see below), whose sum is σ = 504408024. Its totient is φ = 336272008.

The previous prime is 420339991. The next prime is 420340043. The reversal of 420340015 is 510043024.

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 420340015 - 2¹³ = 420331823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420339974 and 420340001.

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, 42033997 + ... + 42034006.

It is an arithmetic number, because the mean of its divisors is an integer number (126102006).

Almost surely, 2^420340015 is an apocalyptic number.

420340015 is a deficient number, since it is larger than the sum of its proper divisors (84068009).

420340015 is an equidigital number, since it uses as much as digits as its factorization.

420340015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84068008.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 420340015 is about 20502.1953702524. The cubic root of 420340015 is about 749.0892738106.

Adding to 420340015 its reverse (510043024), we get a palindrome (930383039).

The spelling of 420340015 in words is "four hundred twenty million, three hundred forty thousand, fifteen".