421243245 has 24 divisors (see below), whose sum is σ = 731068416. Its totient is φ = 224382048.

The previous prime is 421243237. The next prime is 421243279. The reversal of 421243245 is 542342124.

It is not a de Polignac number, because 421243245 - 2³ = 421243237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33412 + ... + 44258.

It is an arithmetic number, because the mean of its divisors is an integer number (30461184).

Almost surely, 2^421243245 is an apocalyptic number.

421243245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421243245 is a deficient number, since it is larger than the sum of its proper divisors (309825171).

421243245 is a wasteful number, since it uses less digits than its factorization.

421243245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11721 (or 11718 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 421243245 is about 20524.2111906889. The cubic root of 421243245 is about 749.6254396372.

Adding to 421243245 its reverse (542342124), we get a palindrome (963585369).

It can be divided in two parts, 42124 and 3245, that added together give a square (45369 = 213²).

The spelling of 421243245 in words is "four hundred twenty-one million, two hundred forty-three thousand, two hundred forty-five".