2623421 has 2 divisors, whose sum is σ = 2623422. Its totient is φ = 2623420.

The previous prime is 2623409. The next prime is 2623429. The reversal of 2623421 is 1243262.

2623421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1651225 + 972196 = 1285^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2623421 - 2¹⁰ = 2622397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2623393 and 2623402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2623429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1311710 + 1311711.

It is an arithmetic number, because the mean of its divisors is an integer number (1311711).

2^2623421 is an apocalyptic number.

It is an amenable number.

2623421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2623421 is an equidigital number, since it uses as much as digits as its factorization.

2623421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 2623421 is about 1619.6978113216. The cubic root of 2623421 is about 137.9185439616.

Adding to 2623421 its reverse (1243262), we get a palindrome (3866683).

The spelling of 2623421 in words is "two million, six hundred twenty-three thousand, four hundred twenty-one".