74418721 has 8 divisors (see below), whose sum is σ = 81273024. Its totient is φ = 67725840.

The previous prime is 74418703. The next prime is 74418733. The reversal of 74418721 is 12781447.

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

It is not a de Polignac number, because 74418721 - 2⁹ = 74418209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74418761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39391 + ... + 41236.

It is an arithmetic number, because the mean of its divisors is an integer number (10159128).

Almost surely, 2^74418721 is an apocalyptic number.

74418721 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

74418721 is a deficient number, since it is larger than the sum of its proper divisors (6854303).

74418721 is a wasteful number, since it uses less digits than its factorization.

74418721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80711.

The product of its digits is 12544, while the sum is 34.

The square root of 74418721 is about 8626.6285998645. The cubic root of 74418721 is about 420.6240176031.

The spelling of 74418721 in words is "seventy-four million, four hundred eighteen thousand, seven hundred twenty-one".