420689015 has 4 divisors (see below), whose sum is σ = 504826824. Its totient is φ = 336551208.

The previous prime is 420688997. The next prime is 420689029. The reversal of 420689015 is 510986024.

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 420689015 - 2⁶ = 420688951 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, 42068897 + ... + 42068906.

It is an arithmetic number, because the mean of its divisors is an integer number (126206706).

Almost surely, 2^420689015 is an apocalyptic number.

420689015 is a deficient number, since it is larger than the sum of its proper divisors (84137809).

420689015 is an equidigital number, since it uses as much as digits as its factorization.

420689015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84137808.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 420689015 is about 20510.7048879360. The cubic root of 420689015 is about 749.2965344620.

The spelling of 420689015 in words is "four hundred twenty million, six hundred eighty-nine thousand, fifteen".