74048581 has 4 divisors (see below), whose sum is σ = 76049932. Its totient is φ = 72047232.

The previous prime is 74048573. The next prime is 74048587. The reversal of 74048581 is 18584047.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70308225 + 3740356 = 8385^2 + 1934^2 .

It is a cyclic number.

It is not a de Polignac number, because 74048581 - 2³ = 74048573 is a prime.

It is a super-2 number, since 2×74048581² = 10966384696227122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 2001313 = 74048581 / (7 + 4 + 0 + 4 + 8 + 5 + 8 + 1).

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 74048581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74048587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000620 + ... + 1000693.

It is an arithmetic number, because the mean of its divisors is an integer number (19012483).

Almost surely, 2^74048581 is an apocalyptic number.

It is an amenable number.

74048581 is a deficient number, since it is larger than the sum of its proper divisors (2001351).

74048581 is a wasteful number, since it uses less digits than its factorization.

74048581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001350.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 74048581 is about 8605.1485170217. The cubic root of 74048581 is about 419.9254988792.

The spelling of 74048581 in words is "seventy-four million, forty-eight thousand, five hundred eighty-one".