6421245 has 8 divisors (see below), whose sum is σ = 10274016. Its totient is φ = 3424656.

The previous prime is 6421243. The next prime is 6421249. The reversal of 6421245 is 5421246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6421245 - 2¹ = 6421243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214027 + ... + 214056.

It is an arithmetic number, because the mean of its divisors is an integer number (1284252).

Almost surely, 2^6421245 is an apocalyptic number.

It is an amenable number.

6421245 is a deficient number, since it is larger than the sum of its proper divisors (3852771).

6421245 is a wasteful number, since it uses less digits than its factorization.

6421245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428091.

The product of its digits is 1920, while the sum is 24.

The square root of 6421245 is about 2534.0175611073. The cubic root of 6421245 is about 185.8687650986.

Subtracting from 6421245 its reverse (5421246), we obtain a palindrome (999999).

It can be divided in two parts, 6421 and 245, that added together give a palindrome (6666).

The spelling of 6421245 in words is "six million, four hundred twenty-one thousand, two hundred forty-five".