71217425 has 24 divisors (see below), whose sum is σ = 91601280. Its totient is φ = 54891200.

The previous prime is 71217389. The next prime is 71217427. The reversal of 71217425 is 52471217.

It is not a de Polignac number, because 71217425 - 2⁸ = 71217169 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71217427) 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, 77720 + ... + 78630.

It is an arithmetic number, because the mean of its divisors is an integer number (3816720).

Almost surely, 2^71217425 is an apocalyptic number.

It is an amenable number.

71217425 is a deficient number, since it is larger than the sum of its proper divisors (20383855).

71217425 is a wasteful number, since it uses less digits than its factorization.

71217425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1028 counting only the distinct ones).

The product of its digits is 3920, while the sum is 29.

The square root of 71217425 is about 8439.0417110001. The cubic root of 71217425 is about 414.5040283876.

The spelling of 71217425 in words is "seventy-one million, two hundred seventeen thousand, four hundred twenty-five".