420449 has 4 divisors (see below), whose sum is σ = 428436. Its totient is φ = 412464.

The previous prime is 420439. The next prime is 420457. The reversal of 420449 is 944024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 211600 + 208849 = 460^2 + 457^2 .

It is a cyclic number.

It is not a de Polignac number, because 420449 - 2⁸ = 420193 is a prime.

It is a super-3 number, since 3×420449³ = 222977594723336547, which contains 333 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420449.

It is not an unprimeable number, because it can be changed into a prime (420419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3914 + ... + 4019.

It is an arithmetic number, because the mean of its divisors is an integer number (107109).

2⁴²⁰⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

420449 is a deficient number, since it is larger than the sum of its proper divisors (7987).

420449 is an equidigital number, since it uses as much as digits as its factorization.

420449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 420449 is about 648.4203883284. The cubic root of 420449 is about 74.9154009054.

It can be divided in two parts, 4 and 20449, that multiplied together give a square (81796 = 286²).

The spelling of 420449 in words is "four hundred twenty thousand, four hundred forty-nine".