7473121 has 2 divisors, whose sum is σ = 7473122. Its totient is φ = 7473120.

The previous prime is 7473119. The next prime is 7473127. The reversal of 7473121 is 1213747.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 1784896 = 2385^2 + 1336^2 .

It is an emirp because it is prime and its reverse (1213747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7473121 - 2¹ = 7473119 is a prime.

Together with 7473119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7473127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3736560 + 3736561.

It is an arithmetic number, because the mean of its divisors is an integer number (3736561).

Almost surely, 2^7473121 is an apocalyptic number.

It is an amenable number.

7473121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7473121 is an equidigital number, since it uses as much as digits as its factorization.

7473121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 25.

The square root of 7473121 is about 2733.7009712110. The cubic root of 7473121 is about 195.5092627571.

Adding to 7473121 its reverse (1213747), we get a palindrome (8686868).

The spelling of 7473121 in words is "seven million, four hundred seventy-three thousand, one hundred twenty-one".