7481021 has 2 divisors, whose sum is σ = 7481022. Its totient is φ = 7481020.

The previous prime is 7481009. The next prime is 7481051. The reversal of 7481021 is 1201847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6832996 + 648025 = 2614^2 + 805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7481021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7481051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3740510 + 3740511.

It is an arithmetic number, because the mean of its divisors is an integer number (3740511).

Almost surely, 2^7481021 is an apocalyptic number.

It is an amenable number.

7481021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7481021 is an equidigital number, since it uses as much as digits as its factorization.

7481021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 7481021 is about 2735.1455171526. The cubic root of 7481021 is about 195.5781308711.

Adding to 7481021 its reverse (1201847), we get a palindrome (8682868).

The spelling of 7481021 in words is "seven million, four hundred eighty-one thousand, twenty-one".