420802249 has 6 divisors (see below), whose sum is σ = 489504714. Its totient is φ = 360687600.

The previous prime is 420802247. The next prime is 420802271. The reversal of 420802249 is 942208024.

It can be written as a sum of positive squares in only one way, i.e., 418939024 + 1863225 = 20468^2 + 1365^2 .

It is not a de Polignac number, because 420802249 - 2¹ = 420802247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420802249.

It is not an unprimeable number, because it can be changed into a prime (420802247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4293852 + ... + 4293949.

It is an arithmetic number, because the mean of its divisors is an integer number (81584119).

Almost surely, 2^420802249 is an apocalyptic number.

420802249 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

420802249 is a deficient number, since it is larger than the sum of its proper divisors (68702465).

420802249 is an equidigital number, since it uses as much as digits as its factorization.

420802249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8587815 (or 8587808 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 420802249 is about 20513.4650656587. The cubic root of 420802249 is about 749.3637561146.

The spelling of 420802249 in words is "four hundred twenty million, eight hundred two thousand, two hundred forty-nine".