74503121 has 16 divisors (see below), whose sum is σ = 93184128. Its totient is φ = 57868800.

The previous prime is 74503073. The next prime is 74503139. The reversal of 74503121 is 12130547.

It is not a de Polignac number, because 74503121 - 2¹⁸ = 74240977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74503151) 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 15 ways as a sum of consecutive naturals, for example, 25811 + ... + 28551.

It is an arithmetic number, because the mean of its divisors is an integer number (5824008).

Almost surely, 2^74503121 is an apocalyptic number.

It is an amenable number.

74503121 is a deficient number, since it is larger than the sum of its proper divisors (18681007).

74503121 is a wasteful number, since it uses less digits than its factorization.

74503121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 74503121 is about 8631.5190435983. The cubic root of 74503121 is about 420.7829706835.

Adding to 74503121 its reverse (12130547), we get a palindrome (86633668).

The spelling of 74503121 in words is "seventy-four million, five hundred three thousand, one hundred twenty-one".