612122421 has 4 divisors (see below), whose sum is σ = 816163232. Its totient is φ = 408081612.

The previous prime is 612122389. The next prime is 612122429. The reversal of 612122421 is 124221216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 612122421 - 2⁵ = 612122389 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 (612122429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102020401 + ... + 102020406.

It is an arithmetic number, because the mean of its divisors is an integer number (204040808).

Almost surely, 2^612122421 is an apocalyptic number.

It is an amenable number.

612122421 is a deficient number, since it is larger than the sum of its proper divisors (204040811).

612122421 is a wasteful number, since it uses less digits than its factorization.

612122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204040810.

The product of its digits is 384, while the sum is 21.

The square root of 612122421 is about 24741.1079177954. The cubic root of 612122421 is about 849.0750820459.

Adding to 612122421 its reverse (124221216), we get a palindrome (736343637).

The spelling of 612122421 in words is "six hundred twelve million, one hundred twenty-two thousand, four hundred twenty-one".