71272975 has 12 divisors (see below), whose sum is σ = 92221776. Its totient is φ = 54538880.

The previous prime is 71272951. The next prime is 71272979. The reversal of 71272975 is 57927217.

It is a happy number.

It is not a de Polignac number, because 71272975 - 2⁹ = 71272463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71272979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61402 + ... + 62551.

It is an arithmetic number, because the mean of its divisors is an integer number (7685148).

Almost surely, 2^71272975 is an apocalyptic number.

71272975 is a deficient number, since it is larger than the sum of its proper divisors (20948801).

71272975 is a wasteful number, since it uses less digits than its factorization.

71272975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123986 (or 123981 counting only the distinct ones).

The product of its digits is 61740, while the sum is 40.

The square root of 71272975 is about 8442.3323199220. The cubic root of 71272975 is about 414.6117722187.

The spelling of 71272975 in words is "seventy-one million, two hundred seventy-two thousand, nine hundred seventy-five".