2421439 has 2 divisors, whose sum is σ = 2421440. Its totient is φ = 2421438.

The previous prime is 2421421. The next prime is 2421443. The reversal of 2421439 is 9341242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2421439 - 2⁵ = 2421407 is a prime.

2421439 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210719 + 1210720.

It is an arithmetic number, because the mean of its divisors is an integer number (1210720).

2^2421439 is an apocalyptic number.

2421439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421439 is an equidigital number, since it uses as much as digits as its factorization.

2421439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 2421439 is about 1556.0973619925. The cubic root of 2421439 is about 134.2840747067.

It can be divided in two parts, 242 and 1439, that added together give a square (1681 = 41²).

The spelling of 2421439 in words is "two million, four hundred twenty-one thousand, four hundred thirty-nine".