2421247 has 2 divisors, whose sum is σ = 2421248. Its totient is φ = 2421246.

The previous prime is 2421229. The next prime is 2421253. The reversal of 2421247 is 7421242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2421247 - 2⁷ = 2421119 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210623 + 1210624.

It is an arithmetic number, because the mean of its divisors is an integer number (1210624).

2^2421247 is an apocalyptic number.

2421247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421247 is an equidigital number, since it uses as much as digits as its factorization.

2421247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 22.

The square root of 2421247 is about 1556.0356679717. The cubic root of 2421247 is about 134.2805254090.

Adding to 2421247 its reverse (7421242), we get a palindrome (9842489).

The spelling of 2421247 in words is "two million, four hundred twenty-one thousand, two hundred forty-seven".