71220601 has 4 divisors (see below), whose sum is σ = 71954932. Its totient is φ = 70486272.

The previous prime is 71220593. The next prime is 71220619. The reversal of 71220601 is 10602217.

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 50979600 + 20241001 = 7140^2 + 4499^2 .

It is a cyclic number.

It is not a de Polignac number, because 71220601 - 2³ = 71220593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71220641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367020 + ... + 367213.

It is an arithmetic number, because the mean of its divisors is an integer number (17988733).

Almost surely, 2^71220601 is an apocalyptic number.

It is an amenable number.

71220601 is a deficient number, since it is larger than the sum of its proper divisors (734331).

71220601 is an equidigital number, since it uses as much as digits as its factorization.

71220601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734330.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 71220601 is about 8439.2298819264. The cubic root of 71220601 is about 414.5101900127.

Adding to 71220601 its reverse (10602217), we get a palindrome (81822818).

The spelling of 71220601 in words is "seventy-one million, two hundred twenty thousand, six hundred one".