73145605 has 8 divisors (see below), whose sum is σ = 94526712. Its totient is φ = 54015168.

The previous prime is 73145593. The next prime is 73145621. The reversal of 73145605 is 50654137.

It can be written as a sum of positive squares in 4 ways, for example, as 7064964 + 66080641 = 2658^2 + 8129^2 .

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 73145605 - 2⁷ = 73145477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562594 + ... + 562723.

It is an arithmetic number, because the mean of its divisors is an integer number (11815839).

Almost surely, 2^73145605 is an apocalyptic number.

It is an amenable number.

73145605 is a deficient number, since it is larger than the sum of its proper divisors (21381107).

73145605 is a wasteful number, since it uses less digits than its factorization.

73145605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125335.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 73145605 is about 8552.5203887509. The cubic root of 73145605 is about 418.2116039032.

The spelling of 73145605 in words is "seventy-three million, one hundred forty-five thousand, six hundred five".