71281025 has 24 divisors (see below), whose sum is σ = 94011840. Its totient is φ = 53493440.

The previous prime is 71281019. The next prime is 71281039. The reversal of 71281025 is 52018217.

It is not a de Polignac number, because 71281025 - 2¹⁸ = 71018881 is a prime.

It is a super-3 number, since 3×71281025³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71280985 and 71281003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29306 + ... + 31644.

It is an arithmetic number, because the mean of its divisors is an integer number (3917160).

Almost surely, 2^71281025 is an apocalyptic number.

It is an amenable number.

71281025 is a deficient number, since it is larger than the sum of its proper divisors (22730815).

71281025 is a wasteful number, since it uses less digits than its factorization.

71281025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425 (or 2420 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 71281025 is about 8442.8090704457. The cubic root of 71281025 is about 414.6273812165.

The spelling of 71281025 in words is "seventy-one million, two hundred eighty-one thousand, twenty-five".