74221451 has 8 divisors (see below), whose sum is σ = 75226320. Its totient is φ = 73222912.

The previous prime is 74221421. The next prime is 74221457. The reversal of 74221451 is 15412247.

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 74221451 - 2¹⁰ = 74220427 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 74221451.

It is not an unprimeable number, because it can be changed into a prime (74221457) 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 7 ways as a sum of consecutive naturals, for example, 24920 + ... + 27738.

It is an arithmetic number, because the mean of its divisors is an integer number (9403290).

Almost surely, 2^74221451 is an apocalyptic number.

74221451 is a deficient number, since it is larger than the sum of its proper divisors (1004869).

74221451 is a wasteful number, since it uses less digits than its factorization.

74221451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165.

The product of its digits is 2240, while the sum is 26.

The square root of 74221451 is about 8615.1872295383. The cubic root of 74221451 is about 420.2520237224.

Adding to 74221451 its reverse (15412247), we get a palindrome (89633698).

The spelling of 74221451 in words is "seventy-four million, two hundred twenty-one thousand, four hundred fifty-one".