71025381 has 24 divisors (see below), whose sum is σ = 118335360. Its totient is φ = 40209696.

The previous prime is 71025373. The next prime is 71025391. The reversal of 71025381 is 18352017.

It is not a de Polignac number, because 71025381 - 2³ = 71025373 is a prime.

It is a super-2 number, since 2×71025381² = 10089209492390322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71025301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1696 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (4930640).

Almost surely, 2^71025381 is an apocalyptic number.

It is an amenable number.

71025381 is a deficient number, since it is larger than the sum of its proper divisors (47309979).

71025381 is a wasteful number, since it uses less digits than its factorization.

71025381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10465 (or 10462 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 71025381 is about 8427.6557238653. The cubic root of 71025381 is about 414.1311108927.

Adding to 71025381 its reverse (18352017), we get a palindrome (89377398).

The spelling of 71025381 in words is "seventy-one million, twenty-five thousand, three hundred eighty-one".