71172725 has 12 divisors (see below), whose sum is σ = 95043396. Its totient is φ = 52558080.

The previous prime is 71172709. The next prime is 71172763. The reversal of 71172725 is 52727117.

It can be written as a sum of positive squares in 6 ways, for example, as 579121 + 70593604 = 761^2 + 8402^2 .

It is not a de Polignac number, because 71172725 - 2⁴ = 71172709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71172691 and 71172700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109172 + ... + 109821.

It is an arithmetic number, because the mean of its divisors is an integer number (7920283).

Almost surely, 2^71172725 is an apocalyptic number.

It is an amenable number.

71172725 is a deficient number, since it is larger than the sum of its proper divisors (23870671).

71172725 is a wasteful number, since it uses less digits than its factorization.

71172725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219016 (or 219011 counting only the distinct ones).

The product of its digits is 6860, while the sum is 32.

The square root of 71172725 is about 8436.3928903294. The cubic root of 71172725 is about 414.4172883428.

The spelling of 71172725 in words is "seventy-one million, one hundred seventy-two thousand, seven hundred twenty-five".