2421791 has 2 divisors, whose sum is σ = 2421792. Its totient is φ = 2421790.

The previous prime is 2421781. The next prime is 2421817. The reversal of 2421791 is 1971242.

It is an a-pointer prime, because the next prime (2421817) can be obtained adding 2421791 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2421791 - 2¹⁰ = 2420767 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2421791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210895 + 1210896.

It is an arithmetic number, because the mean of its divisors is an integer number (1210896).

2^2421791 is an apocalyptic number.

2421791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421791 is an equidigital number, since it uses as much as digits as its factorization.

2421791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 2421791 is about 1556.2104613451. The cubic root of 2421791 is about 134.2905812653.

The spelling of 2421791 in words is "two million, four hundred twenty-one thousand, seven hundred ninety-one".