421404245 has 16 divisors (see below), whose sum is σ = 536433840. Its totient is φ = 316698624.

The previous prime is 421404239. The next prime is 421404251. The reversal of 421404245 is 542404124.

It is an interprime number because it is at equal distance from previous prime (421404239) and next prime (421404251).

It can be written as a sum of positive squares in 8 ways, for example, as 16630084 + 404774161 = 4078^2 + 20119^2 .

It is a cyclic number.

It is not a de Polignac number, because 421404245 - 2¹⁰ = 421403221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44009 + ... + 52721.

It is an arithmetic number, because the mean of its divisors is an integer number (33527115).

Almost surely, 2^421404245 is an apocalyptic number.

It is an amenable number.

421404245 is a deficient number, since it is larger than the sum of its proper divisors (115029595).

421404245 is a wasteful number, since it uses less digits than its factorization.

421404245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 421404245 is about 20528.1330130141. The cubic root of 421404245 is about 749.7209302471.

Adding to 421404245 its reverse (542404124), we get a palindrome (963808369).

The spelling of 421404245 in words is "four hundred twenty-one million, four hundred four thousand, two hundred forty-five".