74001605 has 4 divisors (see below), whose sum is σ = 88801932. Its totient is φ = 59201280.

The previous prime is 74001593. The next prime is 74001607. The reversal of 74001605 is 50610047.

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 40627876 + 33373729 = 6374^2 + 5777^2 .

It is not a de Polignac number, because 74001605 - 2¹⁶ = 73936069 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 (74001607) 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, 7400156 + ... + 7400165.

It is an arithmetic number, because the mean of its divisors is an integer number (22200483).

Almost surely, 2^74001605 is an apocalyptic number.

It is an amenable number.

74001605 is a deficient number, since it is larger than the sum of its proper divisors (14800327).

74001605 is a wasteful number, since it uses less digits than its factorization.

74001605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14800326.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 74001605 is about 8602.4185552669. The cubic root of 74001605 is about 419.8366806427.

The spelling of 74001605 in words is "seventy-four million, one thousand, six hundred five".