2412721 has 2 divisors, whose sum is σ = 2412722. Its totient is φ = 2412720.

The previous prime is 2412703. The next prime is 2412731. The reversal of 2412721 is 1272142.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2283121 + 129600 = 1511^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 2412721 - 2⁵ = 2412689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2412731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1206360 + 1206361.

It is an arithmetic number, because the mean of its divisors is an integer number (1206361).

2^2412721 is an apocalyptic number.

It is an amenable number.

2412721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2412721 is an equidigital number, since it uses as much as digits as its factorization.

2412721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 19.

The square root of 2412721 is about 1553.2935974889. The cubic root of 2412721 is about 134.1227248732.

Adding to 2412721 its reverse (1272142), we get a palindrome (3684863).

The spelling of 2412721 in words is "two million, four hundred twelve thousand, seven hundred twenty-one".