6246121421 has 4 divisors (see below), whose sum is σ = 6247892892. Its totient is φ = 6244349952.

The previous prime is 6246121379. The next prime is 6246121423. The reversal of 6246121421 is 1241216426.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1241216426 = 2 ⋅620608213.

It can be written as a sum of positive squares in 2 ways, for example, as 4424112196 + 1822009225 = 66514^2 + 42685^2 .

It is a cyclic number.

It is not a de Polignac number, because 6246121421 - 2¹⁴ = 6246105037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6246121423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880436 + ... + 887501.

It is an arithmetic number, because the mean of its divisors is an integer number (1561973223).

Almost surely, 2^6246121421 is an apocalyptic number.

It is an amenable number.

6246121421 is a deficient number, since it is larger than the sum of its proper divisors (1771471).

6246121421 is a wasteful number, since it uses less digits than its factorization.

6246121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771470.

The product of its digits is 4608, while the sum is 29.

The square root of 6246121421 is about 79032.4074098721. The cubic root of 6246121421 is about 1841.6346356142.

Adding to 6246121421 its reverse (1241216426), we get a palindrome (7487337847).

The spelling of 6246121421 in words is "six billion, two hundred forty-six million, one hundred twenty-one thousand, four hundred twenty-one".