71272457 has 8 divisors (see below), whose sum is σ = 73856640. Its totient is φ = 68730480.

The previous prime is 71272451. The next prime is 71272463. The reversal of 71272457 is 75427217.

It is an interprime number because it is at equal distance from previous prime (71272451) and next prime (71272463).

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 71272457 - 2⁶ = 71272393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71272451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7094 + ... + 13887.

It is an arithmetic number, because the mean of its divisors is an integer number (9232080).

Almost surely, 2^71272457 is an apocalyptic number.

It is an amenable number.

71272457 is a deficient number, since it is larger than the sum of its proper divisors (2584183).

71272457 is a wasteful number, since it uses less digits than its factorization.

71272457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21103.

The product of its digits is 27440, while the sum is 35.

The square root of 71272457 is about 8442.3016411403. The cubic root of 71272457 is about 414.6107677734.

The spelling of 71272457 in words is "seventy-one million, two hundred seventy-two thousand, four hundred fifty-seven".