74271685 has 4 divisors (see below), whose sum is σ = 89126028. Its totient is φ = 59417344.

The previous prime is 74271677. The next prime is 74271713. The reversal of 74271685 is 58617247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58617247 = 13 ⋅4509019.

It can be written as a sum of positive squares in 2 ways, for example, as 51365889 + 22905796 = 7167^2 + 4786^2 .

It is a cyclic number.

It is not a de Polignac number, because 74271685 - 2³ = 74271677 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7427164 + ... + 7427173.

It is an arithmetic number, because the mean of its divisors is an integer number (22281507).

Almost surely, 2^74271685 is an apocalyptic number.

It is an amenable number.

74271685 is a deficient number, since it is larger than the sum of its proper divisors (14854343).

74271685 is a wasteful number, since it uses less digits than its factorization.

74271685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14854342.

The product of its digits is 94080, while the sum is 40.

The square root of 74271685 is about 8618.1021692714. The cubic root of 74271685 is about 420.3468129374.

It can be divided in two parts, 742 and 71685, that added together give a palindrome (72427).

The spelling of 74271685 in words is "seventy-four million, two hundred seventy-one thousand, six hundred eighty-five".