74309121 has 6 divisors (see below), whose sum is σ = 107335410. Its totient is φ = 49539408.

The previous prime is 74309119. The next prime is 74309149. The reversal of 74309121 is 12190347.

It can be written as a sum of positive squares in only one way, i.e., 72590400 + 1718721 = 8520^2 + 1311^2 .

It is not a de Polignac number, because 74309121 - 2¹ = 74309119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74309111) 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 in 5 ways as a sum of consecutive naturals, for example, 4128276 + ... + 4128293.

It is an arithmetic number, because the mean of its divisors is an integer number (17889235).

Almost surely, 2^74309121 is an apocalyptic number.

It is an amenable number.

74309121 is a deficient number, since it is larger than the sum of its proper divisors (33026289).

74309121 is a wasteful number, since it uses less digits than its factorization.

74309121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8256575 (or 8256572 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 74309121 is about 8620.2738355577. The cubic root of 74309121 is about 420.4174251326.

Adding to 74309121 its reverse (12190347), we get a palindrome (86499468).

The spelling of 74309121 in words is "seventy-four million, three hundred nine thousand, one hundred twenty-one".