420665715 has 12 divisors (see below), whose sum is σ = 729153984. Its totient is φ = 224355024.

The previous prime is 420665701. The next prime is 420665737. The reversal of 420665715 is 517566024.

It is a happy number.

420665715 is a `hidden beast` number, since 4 + 20 + 66 + 571 + 5 = 666.

It is not a de Polignac number, because 420665715 - 2⁷ = 420665587 is a prime.

It is a super-2 number, since 2×420665715² = 353919287552922450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420665715.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4674019 + ... + 4674108.

It is an arithmetic number, because the mean of its divisors is an integer number (60762832).

Almost surely, 2^420665715 is an apocalyptic number.

420665715 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

420665715 is a deficient number, since it is larger than the sum of its proper divisors (308488269).

420665715 is a wasteful number, since it uses less digits than its factorization.

420665715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9348138 (or 9348135 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 420665715 is about 20510.1368839898. The cubic root of 420665715 is about 749.2827008613.

The spelling of 420665715 in words is "four hundred twenty million, six hundred sixty-five thousand, seven hundred fifteen".