2649421 has 2 divisors, whose sum is σ = 2649422. Its totient is φ = 2649420.

The previous prime is 2649403. The next prime is 2649431. The reversal of 2649421 is 1249462.

2649421 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., 2368521 + 280900 = 1539^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2649421 - 2⁷ = 2649293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2649421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649431) 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, 1324710 + 1324711.

It is an arithmetic number, because the mean of its divisors is an integer number (1324711).

2^2649421 is an apocalyptic number.

It is an amenable number.

2649421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649421 is an equidigital number, since it uses as much as digits as its factorization.

2649421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 2649421 is about 1627.7042114586. The cubic root of 2649421 is about 138.3726711885.

The spelling of 2649421 in words is "two million, six hundred forty-nine thousand, four hundred twenty-one".