71220607 has 12 divisors (see below), whose sum is σ = 77769720. Its totient is φ = 65135952.

The previous prime is 71220593. The next prime is 71220619. The reversal of 71220607 is 70602217.

It is a de Polignac number, because none of the positive numbers 2^k-71220607 is a prime.

It is a super-2 number, since 2×71220607² = 10144749722896898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71220637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7068 + ... + 13870.

It is an arithmetic number, because the mean of its divisors is an integer number (6480810).

Almost surely, 2^71220607 is an apocalyptic number.

71220607 is a deficient number, since it is larger than the sum of its proper divisors (6549113).

71220607 is a wasteful number, since it uses less digits than its factorization.

71220607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870 (or 6851 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 71220607 is about 8439.2302374091. The cubic root of 71220607 is about 414.5102016529.

The spelling of 71220607 in words is "seventy-one million, two hundred twenty thousand, six hundred seven".