74681545 has 8 divisors (see below), whose sum is σ = 89670024. Its totient is φ = 59710464.

The previous prime is 74681531. The next prime is 74681557. The reversal of 74681545 is 54518647.

It can be written as a sum of positive squares in 4 ways, for example, as 394384 + 74287161 = 628^2 + 8619^2 .

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 74681545 - 2⁵ = 74681513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74681498 and 74681507.

It is an unprimeable number.

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, 8617 + ... + 14953.

It is an arithmetic number, because the mean of its divisors is an integer number (11208753).

Almost surely, 2^74681545 is an apocalyptic number.

It is an amenable number.

74681545 is a deficient number, since it is larger than the sum of its proper divisors (14988479).

74681545 is a wasteful number, since it uses less digits than its factorization.

74681545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8699.

The product of its digits is 134400, while the sum is 40.

The square root of 74681545 is about 8641.8484712473. The cubic root of 74681545 is about 421.1186073027.

The spelling of 74681545 in words is "seventy-four million, six hundred eighty-one thousand, five hundred forty-five".