6421254111 has 24 divisors (see below), whose sum is σ = 9342722480. Its totient is φ = 4249708416.

The previous prime is 6421254109. The next prime is 6421254131. The reversal of 6421254111 is 1114521246.

6421254111 is a `hidden beast` number, since 642 + 1 + 2 + 5 + 4 + 1 + 11 = 666.

It is not a de Polignac number, because 6421254111 - 2¹ = 6421254109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421254131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1654305 + ... + 1658181.

Almost surely, 2^6421254111 is an apocalyptic number.

6421254111 is a deficient number, since it is larger than the sum of its proper divisors (2921468369).

6421254111 is a wasteful number, since it uses less digits than its factorization.

6421254111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5175 (or 5172 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 6421254111 is about 80132.7280890898. The cubic root of 6421254111 is about 1858.6885300724.

Adding to 6421254111 its reverse (1114521246), we get a palindrome (7535775357).

The spelling of 6421254111 in words is "six billion, four hundred twenty-one million, two hundred fifty-four thousand, one hundred eleven".