71272418 has 16 divisors (see below), whose sum is σ = 122619840. Its totient is φ = 30435696.

The previous prime is 71272403. The next prime is 71272451. The reversal of 71272418 is 81427217.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5033 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (7663740).

Almost surely, 2^71272418 is an apocalyptic number.

71272418 is a deficient number, since it is larger than the sum of its proper divisors (51347422).

71272418 is a wasteful number, since it uses less digits than its factorization.

71272418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18281.

The product of its digits is 6272, while the sum is 32.

The square root of 71272418 is about 8442.2993313433. The cubic root of 71272418 is about 414.6106921489.

The spelling of 71272418 in words is "seventy-one million, two hundred seventy-two thousand, four hundred eighteen".