71810625 has 20 divisors (see below), whose sum is σ = 119649200. Its totient is φ = 38298000.

The previous prime is 71810621. The next prime is 71810647. The reversal of 71810625 is 52601817.

It is not a de Polignac number, because 71810625 - 2² = 71810621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71810592 and 71810601.

It is not an unprimeable number, because it can be changed into a prime (71810621) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 17275 + ... + 21024.

It is an arithmetic number, because the mean of its divisors is an integer number (5982460).

Almost surely, 2^71810625 is an apocalyptic number.

71810625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71810625 is a deficient number, since it is larger than the sum of its proper divisors (47838575).

71810625 is an equidigital number, since it uses as much as digits as its factorization.

71810625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38322 (or 38307 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 71810625 is about 8474.1149980396. The cubic root of 71810625 is about 415.6517074439.

The spelling of 71810625 in words is "seventy-one million, eight hundred ten thousand, six hundred twenty-five".