7404412721 has 2 divisors, whose sum is σ = 7404412722. Its totient is φ = 7404412720.

The previous prime is 7404412699. The next prime is 7404412723. The reversal of 7404412721 is 1272144047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7107333025 + 297079696 = 84305^2 + 17236^2 .

It is an emirp because it is prime and its reverse (1272144047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7404412721 - 2¹⁰ = 7404411697 is a prime.

Together with 7404412723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7404412723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3702206360 + 3702206361.

It is an arithmetic number, because the mean of its divisors is an integer number (3702206361).

Almost surely, 2^7404412721 is an apocalyptic number.

It is an amenable number.

7404412721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7404412721 is an equidigital number, since it uses as much as digits as its factorization.

7404412721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 7404412721 is about 86048.8972677744. The cubic root of 7404412721 is about 1949.0824279143.

Adding to 7404412721 its reverse (1272144047), we get a palindrome (8676556768).

The spelling of 7404412721 in words is "seven billion, four hundred four million, four hundred twelve thousand, seven hundred twenty-one".