234421421 has 6 divisors (see below), whose sum is σ = 253841130. Its totient is φ = 216388848.

The previous prime is 234421417. The next prime is 234421433. The reversal of 234421421 is 124124432.

It can be written as a sum of positive squares in 3 ways, for example, as 25300900 + 209120521 = 5030^2 + 14461^2 .

It is not a de Polignac number, because 234421421 - 2² = 234421417 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 (234421021) 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 5 ways as a sum of consecutive naturals, for example, 693386 + ... + 693723.

It is an arithmetic number, because the mean of its divisors is an integer number (42306855).

Almost surely, 2^234421421 is an apocalyptic number.

It is an amenable number.

234421421 is a deficient number, since it is larger than the sum of its proper divisors (19419709).

234421421 is a wasteful number, since it uses less digits than its factorization.

234421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387135 (or 1387122 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 234421421 is about 15310.8269208426. The cubic root of 234421421 is about 616.5937213286.

Adding to 234421421 its reverse (124124432), we get a palindrome (358545853).

The spelling of 234421421 in words is "two hundred thirty-four million, four hundred twenty-one thousand, four hundred twenty-one".