71605601 has 8 divisors (see below), whose sum is σ = 74969664. Its totient is φ = 68262480.

The previous prime is 71605579. The next prime is 71605609. The reversal of 71605601 is 10650617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71605601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71605609) by changing a digit.

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, 1991 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (9371208).

Almost surely, 2^71605601 is an apocalyptic number.

It is an amenable number.

71605601 is a deficient number, since it is larger than the sum of its proper divisors (3364063).

71605601 is a wasteful number, since it uses less digits than its factorization.

71605601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10471.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 71605601 is about 8462.0092767616. The cubic root of 71605601 is about 415.2557595087.

The spelling of 71605601 in words is "seventy-one million, six hundred five thousand, six hundred one".