74242751 has 16 divisors (see below), whose sum is σ = 83317248. Its totient is φ = 65577600.

The previous prime is 74242703. The next prime is 74242769. The reversal of 74242751 is 15724247.

It is not a de Polignac number, because 74242751 - 2⁶ = 74242687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74242951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83831 + ... + 84711.

It is an arithmetic number, because the mean of its divisors is an integer number (5207328).

Almost surely, 2^74242751 is an apocalyptic number.

74242751 is a deficient number, since it is larger than the sum of its proper divisors (9074497).

74242751 is a wasteful number, since it uses less digits than its factorization.

74242751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102.

The product of its digits is 15680, while the sum is 32.

The square root of 74242751 is about 8616.4233298974. The cubic root of 74242751 is about 420.2922210501.

Adding to 74242751 its reverse (15724247), we get a palindrome (89966998).

The spelling of 74242751 in words is "seventy-four million, two hundred forty-two thousand, seven hundred fifty-one".