3231421 has 2 divisors, whose sum is σ = 3231422. Its totient is φ = 3231420.

The previous prime is 3231413. The next prime is 3231427. The reversal of 3231421 is 1241323.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3062500 + 168921 = 1750^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 3231421 - 2³ = 3231413 is a prime.

It is equal to p₂₃₂₃₃₃ and since 3231421 and 232333 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 3231395 and 3231404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3231427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615710 + 1615711.

It is an arithmetic number, because the mean of its divisors is an integer number (1615711).

Almost surely, 2^3231421 is an apocalyptic number.

It is an amenable number.

3231421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3231421 is an equidigital number, since it uses as much as digits as its factorization.

3231421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 16.

The square root of 3231421 is about 1797.6153648654. The cubic root of 3231421 is about 147.8420063431.

Adding to 3231421 its reverse (1241323), we get a palindrome (4472744).

The spelling of 3231421 in words is "three million, two hundred thirty-one thousand, four hundred twenty-one".