74721355 has 8 divisors (see below), whose sum is σ = 89893872. Its totient is φ = 59624928.

The previous prime is 74721343. The next prime is 74721359. The reversal of 74721355 is 55312747.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74721355 - 2⁹ = 74720843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74721355.

It is not an unprimeable number, because it can be changed into a prime (74721359) 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 in 7 ways as a sum of consecutive naturals, for example, 16837 + ... + 20806.

It is an arithmetic number, because the mean of its divisors is an integer number (11236734).

Almost surely, 2^74721355 is an apocalyptic number.

74721355 is a deficient number, since it is larger than the sum of its proper divisors (15172517).

74721355 is a wasteful number, since it uses less digits than its factorization.

74721355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38045.

The product of its digits is 29400, while the sum is 34.

The square root of 74721355 is about 8644.1514910372. The cubic root of 74721355 is about 421.1934216528.

It can be divided in two parts, 74721 and 355, that added together give a square (75076 = 274²).

The spelling of 74721355 in words is "seventy-four million, seven hundred twenty-one thousand, three hundred fifty-five".