74454421 has 4 divisors (see below), whose sum is σ = 74675692. Its totient is φ = 74233152.

The previous prime is 74454409. The next prime is 74454433. The reversal of 74454421 is 12445447.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (74454409) and next prime (74454433).

It can be written as a sum of positive squares in 2 ways, for example, as 23902321 + 50552100 = 4889^2 + 7110^2 .

It is a cyclic number.

It is not a de Polignac number, because 74454421 - 2⁵ = 74454389 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 (74454461) 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 3 ways as a sum of consecutive naturals, for example, 110130 + ... + 110803.

It is an arithmetic number, because the mean of its divisors is an integer number (18668923).

Almost surely, 2^74454421 is an apocalyptic number.

It is an amenable number.

74454421 is a deficient number, since it is larger than the sum of its proper divisors (221271).

74454421 is a wasteful number, since it uses less digits than its factorization.

74454421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221270.

The product of its digits is 17920, while the sum is 31.

The square root of 74454421 is about 8628.6975262782. The cubic root of 74454421 is about 420.6912671548.

Adding to 74454421 its reverse (12445447), we get a palindrome (86899868).

The spelling of 74454421 in words is "seventy-four million, four hundred fifty-four thousand, four hundred twenty-one".