71272001 has 8 divisors (see below), whose sum is σ = 73094400. Its totient is φ = 69472480.

The previous prime is 71271979. The next prime is 71272013. The reversal of 71272001 is 10027217.

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 71272001 - 2²² = 67077697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71272031) 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, 680 + ... + 11958.

It is an arithmetic number, because the mean of its divisors is an integer number (9136800).

Almost surely, 2^71272001 is an apocalyptic number.

71272001 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

71272001 is the 3776-th centered decagonal number.

It is an amenable number.

71272001 is a deficient number, since it is larger than the sum of its proper divisors (1822399).

71272001 is a wasteful number, since it uses less digits than its factorization.

71272001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 71272001 is about 8442.2746342440. The cubic root of 71272001 is about 414.6098835472.

Adding to 71272001 its reverse (10027217), we get a palindrome (81299218).

The spelling of 71272001 in words is "seventy-one million, two hundred seventy-two thousand, one".