71381272 has 8 divisors (see below), whose sum is σ = 133839900. Its totient is φ = 35690632.

The previous prime is 71381269. The next prime is 71381273. The reversal of 71381272 is 27218317.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71381273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4461322 + ... + 4461337.

Almost surely, 2^71381272 is an apocalyptic number.

It is an amenable number.

71381272 is a deficient number, since it is larger than the sum of its proper divisors (62458628).

71381272 is a wasteful number, since it uses less digits than its factorization.

71381272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8922665 (or 8922661 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 71381272 is about 8448.7438119522. The cubic root of 71381272 is about 414.8216623783.

Adding to 71381272 its reverse (27218317), we get a palindrome (98599589).

The spelling of 71381272 in words is "seventy-one million, three hundred eighty-one thousand, two hundred seventy-two".