74471645 has 8 divisors (see below), whose sum is σ = 94622904. Its totient is φ = 56072704.

The previous prime is 74471609. The next prime is 74471647. The reversal of 74471645 is 54617447.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11062276 + 63409369 = 3326^2 + 7963^2 .

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 74471645 - 2¹⁰ = 74470621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74471599 and 74471608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74471647) 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, 437984 + ... + 438153.

It is an arithmetic number, because the mean of its divisors is an integer number (11827863).

Almost surely, 2^74471645 is an apocalyptic number.

It is an amenable number.

74471645 is a deficient number, since it is larger than the sum of its proper divisors (20151259).

74471645 is a wasteful number, since it uses less digits than its factorization.

74471645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876159.

The product of its digits is 94080, while the sum is 38.

The square root of 74471645 is about 8629.6955334473. The cubic root of 74471645 is about 420.7237050213.

The spelling of 74471645 in words is "seventy-four million, four hundred seventy-one thousand, six hundred forty-five".