420105265 has 4 divisors (see below), whose sum is σ = 504126324. Its totient is φ = 336084208.

The previous prime is 420105263. The next prime is 420105269. The reversal of 420105265 is 562501024.

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 310358689 + 109746576 = 17617^2 + 10476^2 .

It is a cyclic number.

It is not a de Polignac number, because 420105265 - 2¹ = 420105263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420105263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42010522 + ... + 42010531.

It is an arithmetic number, because the mean of its divisors is an integer number (126031581).

Almost surely, 2^420105265 is an apocalyptic number.

It is an amenable number.

420105265 is a deficient number, since it is larger than the sum of its proper divisors (84021059).

420105265 is an equidigital number, since it uses as much as digits as its factorization.

420105265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84021058.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 420105265 is about 20496.4695740510. The cubic root of 420105265 is about 748.9497982696.

Adding to 420105265 its reverse (562501024), we get a palindrome (982606289).

The spelling of 420105265 in words is "four hundred twenty million, one hundred five thousand, two hundred sixty-five".