421200445 has 4 divisors (see below), whose sum is σ = 505440540. Its totient is φ = 336960352.

The previous prime is 421200443. The next prime is 421200463. The reversal of 421200445 is 544002124.

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 147331044 + 273869401 = 12138^2 + 16549^2 .

It is a cyclic number.

It is not a de Polignac number, because 421200445 - 2¹ = 421200443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421200443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42120040 + ... + 42120049.

It is an arithmetic number, because the mean of its divisors is an integer number (126360135).

Almost surely, 2^421200445 is an apocalyptic number.

It is an amenable number.

421200445 is a deficient number, since it is larger than the sum of its proper divisors (84240095).

421200445 is an equidigital number, since it uses as much as digits as its factorization.

421200445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84240094.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 421200445 is about 20523.1684931932. The cubic root of 421200445 is about 749.6000504621.

Adding to 421200445 its reverse (544002124), we get a palindrome (965202569).

The spelling of 421200445 in words is "four hundred twenty-one million, two hundred thousand, four hundred forty-five".