71385225 has 12 divisors (see below), whose sum is σ = 118023696. Its totient is φ = 38072080.

The previous prime is 71385191. The next prime is 71385233. The reversal of 71385225 is 52258317.

It is not a de Polignac number, because 71385225 - 2⁸ = 71384969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475827 + ... + 475976.

It is an arithmetic number, because the mean of its divisors is an integer number (9835308).

Almost surely, 2^71385225 is an apocalyptic number.

71385225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71385225 is a deficient number, since it is larger than the sum of its proper divisors (46638471).

71385225 is a wasteful number, since it uses less digits than its factorization.

71385225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951816 (or 951811 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 71385225 is about 8448.9777488167. The cubic root of 71385225 is about 414.8293196611.

The spelling of 71385225 in words is "seventy-one million, three hundred eighty-five thousand, two hundred twenty-five".