421202345 has 4 divisors (see below), whose sum is σ = 505442820. Its totient is φ = 336961872.

The previous prime is 421202333. The next prime is 421202371. The reversal of 421202345 is 543202124.

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 278088976 + 143113369 = 16676^2 + 11963^2 .

It is a cyclic number.

It is not a de Polignac number, because 421202345 - 2⁶ = 421202281 is a prime.

It is a super-2 number, since 2×421202345² = 354822830866998050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421202345.

It is an unprimeable number.

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, 42120230 + ... + 42120239.

It is an arithmetic number, because the mean of its divisors is an integer number (126360705).

Almost surely, 2^421202345 is an apocalyptic number.

It is an amenable number.

421202345 is a deficient number, since it is larger than the sum of its proper divisors (84240475).

421202345 is an equidigital number, since it uses as much as digits as its factorization.

421202345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84240474.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421202345 is about 20523.2147822898. The cubic root of 421202345 is about 749.6011775881.

Adding to 421202345 its reverse (543202124), we get a palindrome (964404469).

The spelling of 421202345 in words is "four hundred twenty-one million, two hundred two thousand, three hundred forty-five".