71399625 has 64 divisors (see below), whose sum is σ = 136581120. Its totient is φ = 32760000.

The previous prime is 71399623. The next prime is 71399633. The reversal of 71399625 is 52699317.

It is not a de Polignac number, because 71399625 - 2¹ = 71399623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71399623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77920 + ... + 78830.

It is an arithmetic number, because the mean of its divisors is an integer number (2134080).

Almost surely, 2^71399625 is an apocalyptic number.

71399625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71399625 is a deficient number, since it is larger than the sum of its proper divisors (65181495).

71399625 is a wasteful number, since it uses less digits than its factorization.

71399625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 949 counting only the distinct ones).

The product of its digits is 102060, while the sum is 42.

The square root of 71399625 is about 8449.8298799443. The cubic root of 71399625 is about 414.8572112432.

The spelling of 71399625 in words is "seventy-one million, three hundred ninety-nine thousand, six hundred twenty-five".