71872165 has 8 divisors (see below), whose sum is σ = 88081920. Its totient is φ = 56274192.

The previous prime is 71872153. The next prime is 71872169. The reversal of 71872165 is 56127817.

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 71872165 - 2⁵ = 71872133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71872169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152685 + ... + 153154.

It is an arithmetic number, because the mean of its divisors is an integer number (11010240).

Almost surely, 2^71872165 is an apocalyptic number.

It is an amenable number.

71872165 is a deficient number, since it is larger than the sum of its proper divisors (16209755).

71872165 is a wasteful number, since it uses less digits than its factorization.

71872165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305891.

The product of its digits is 23520, while the sum is 37.

The square root of 71872165 is about 8477.7452780795. The cubic root of 71872165 is about 415.7704080894.

The spelling of 71872165 in words is "seventy-one million, eight hundred seventy-two thousand, one hundred sixty-five".