420419665 has 8 divisors (see below), whose sum is σ = 506097000. Its totient is φ = 335273472.

The previous prime is 420419647. The next prime is 420419677. The reversal of 420419665 is 566914024.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 420373009 = 216^2 + 20503^2 .

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 420419665 - 2⁵ = 420419633 is a prime.

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, 131040 + ... + 134209.

It is an arithmetic number, because the mean of its divisors is an integer number (63262125).

Almost surely, 2^420419665 is an apocalyptic number.

It is an amenable number.

420419665 is a deficient number, since it is larger than the sum of its proper divisors (85677335).

420419665 is a wasteful number, since it uses less digits than its factorization.

420419665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265571.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 420419665 is about 20504.1377531463. The cubic root of 420419665 is about 749.1365856616.

The spelling of 420419665 in words is "four hundred twenty million, four hundred nineteen thousand, six hundred sixty-five".