420415855 has 8 divisors (see below), whose sum is σ = 504666000. Its totient is φ = 336221376.

The previous prime is 420415841. The next prime is 420415889. The reversal of 420415855 is 558514024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420415855 - 2⁵ = 420415823 is a prime.

It is a super-2 number, since 2×420415855² = 353498982270762050, 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 420415855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5056 + ... + 29434.

It is an arithmetic number, because the mean of its divisors is an integer number (63083250).

Almost surely, 2^420415855 is an apocalyptic number.

420415855 is a deficient number, since it is larger than the sum of its proper divisors (84250145).

420415855 is a wasteful number, since it uses less digits than its factorization.

420415855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27833.

The product of its (nonzero) digits is 32000, while the sum is 34.

The square root of 420415855 is about 20504.0448448593. The cubic root of 420415855 is about 749.1343226696.

Adding to 420415855 its reverse (558514024), we get a palindrome (978929879).

The spelling of 420415855 in words is "four hundred twenty million, four hundred fifteen thousand, eight hundred fifty-five".